False Assumption Registry

Schools Can Make All Students Equal

False Assumption: Schools and equalized environments can eliminate or substantially narrow individual differences in student achievement and learning outcomes.

Summaries Written by FARAgent (AI) on February 26, 2026 · Pending Verification

For decades, a great deal of education policy rested on a decent democratic hope: if schools were properly funded, classrooms properly integrated, and expectations held high, then large differences in achievement could be narrowed or even erased. This was not madness. Schools plainly do matter, some children are badly served by chaotic homes and weak instruction, and the civil rights case for equal opportunity naturally slid into the belief that equal environments should yield roughly equal results. By the 1980s and 1990s, ideas like multiple intelligences helped the case along by suggesting that ability was broader, more malleable, and less fixed than old IQ models implied. A reasonable reformer could look at bad schools, unequal spending, and low expectations and conclude that better institutions would do most of the work.

That belief hardened into policy in the No Child Left Behind era. Politicians promised that data, accountability, and the right interventions would "close the achievement gap," and many districts reorganized classrooms around mixed ability, inclusion, and the assumption that most differences were products of environment. But the results were stubborn. Achievement gaps proved durable, even where spending rose, standards tightened, and access improved; in many classrooms teachers were asked to teach students several grade levels apart at once, which pleased theorists more than practitioners. Arthur Jensen had warned back in 1969 that equalizing environments would not equalize outcomes to the degree reformers expected, and a growing body of later research on cognitive variation, family background, and the limits of school effects has made that warning harder to dismiss.

The current debate has not ended, and it should not be caricatured. Few serious people deny that schools can raise achievement, sometimes substantially, or that bad schools can do real damage. But growing evidence suggests the stronger claim, that schools can make all students roughly equal in performance if only the system is designed correctly, was too confident. An influential minority of researchers now argue that policy took a real but limited truth, that environment matters, and turned it into a doctrine that ignored persistent individual differences.

Status: A small but growing and influential group of experts think this was false
People Involved
  • Howard Gardner was the Harvard psychologist who in 1983 published Frames of Mind and spent the following decades arguing that intelligence came in at least seven distinct flavors. His theory of multiple intelligences became required reading in teacher-training programs across the United States, where it was presented as proof that every child could succeed if only schools tailored instruction to each learner's unique profile. Gardner's ideas shaped curriculum committees, professional-development workshops, and state standards for a generation. The result was a widespread conviction among educators that a single IQ score was obsolete and that achievement gaps could be erased by clever differentiation. By the time psychologists outside education circles had repeatedly failed to find empirical support for the theory, it had already become pedagogical orthodoxy. [1]
  • Arthur R. Jensen was the University of California, Berkeley psychologist who in 1969 published a long paper in the Harvard Educational Review warning that compensatory education rested on a false premise about the malleability of intelligence. He pointed out that heritability estimates for IQ reached 0.80 in adulthood and that school-based interventions had produced only temporary gains. Jensen's conclusions were met with protests, canceled lectures, and accusations of racism that effectively ended his role in mainstream policy discussions. Yet the data he marshaled never went away, and later twin studies and genomic analyses kept confirming the pattern he had described. For half a century he served as the unwelcome messenger whose forecast proved more accurate than the official optimism. [1][6]
  • James S. Coleman was the Johns Hopkins sociologist chosen by Congress in 1964 to measure the quality of American schooling under the new Civil Rights Act. His 1966 report, Equality of Educational Opportunity, concluded that family background explained far more of the black-white achievement gap than differences in school resources. Coleman expected his findings to be welcomed as careful social science; instead they were largely ignored or attacked by the very officials who had commissioned them. The Johnson administration downplayed the document while pressing ahead with the Elementary and Secondary Education Act. Coleman spent the rest of his career documenting that schools, no matter how equalized, largely transmitted the inequalities children brought through the front door. [7][8]
  • Jaime Escalante was the Bolivian-born math teacher at Garfield High in East Los Angeles who built a legendary Advanced Placement calculus program in the early 1980s. Working with principal Henry Gradillas, he required years of preparatory courses, Saturday tutoring, and summer sessions before students ever reached calculus. The 1988 film Stand and Deliver compressed that decade of pipeline building into a single inspirational year and left audiences believing that any motivated teacher could produce similar miracles overnight. Escalante himself left Garfield in 1991 after administrators changed the rules and limited class sizes; the program collapsed soon afterward. The movie, however, continued to be shown in education classes as proof that environment alone could overcome any deficit. [11]
▶ Supporting Quotes (19)
“Howard Gardner’s theory of multiple intelligences—despite having little support from psychologists—is widely taught in American teacher training programs”— Intelligence and Education
“As psychologist Arthur Jensen stated over fifty years ago, “A philosophy of equalization, however laudable its ideals, cannot work if it is based on false premises, and no amount of propaganda can make it appear to work. Its failures will be forced upon everyone.””— Intelligence and Education
“Almost 85 percent endorsed Howard Gardner’s theory of multiple intelligences. ... Howard Gardner’s theory of multiple intelligences—despite having little support from psychologists—is widely taught in American teacher training programs.”— Intelligence and Education
“As psychologist Arthur Jensen stated over fifty years ago, “A philosophy of equalization, however laudable its ideals, cannot work if it is based on false premises, and no amount of propaganda can make it appear to work. Its failures will be forced upon everyone.””— Intelligence and Education
“President Bush promoted NCLB as a means of replicating at the federal level the ‘success’ previously achieved at the state level, such as in Texas (where he was governor) and New York.”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“Secretary Paige asserted that NCLB builds on goals of the Civil Rights movement of the 1950s and 60s: The [education] achievement gap is the civil rights issue of our time. The law creates the conditions of equitable access to education for all children. It brings us a step closer to the promise of our Constitution. It fulfills the mandate in Brown v. Board for Education for equal educational opportunity.”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“When President George W. Bush signed the No Child Left Behind Act (NCLB) in 2002, the goal was to help low-achieving schools improve standards, raise test scores, and better serve low-income children in grades K-12.”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“When President Bush signed NCLB into law, his goal was to reach 100 percent proficiency rates in reading and math by 2014 (U.S. Department of Education, 2014).”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“Arthur Jensen argues that the failure of recent compensatory education efforts to produce lasting effects on children’s IQ and achievement suggests that the premises on which these efforts have been based should be reexamined.”— How Much Can We Boost IQ and Scholastic Achievement?
“the Coleman report — unveiled two major surprises. First, it revealed an enormous achievement gap between America’s black and white students. Second, it suggested that the gap arose largely from differences among families.”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
“Johns Hopkins University sociologist,James S. Coleman. ... Coleman’s analysis concluded that the primary predictor of student academic success was not disparities in access to school resources such as textbooks, laboratories, library facilities, or even curriculum quality; rather, it was a child’s home environment.”— The Link Between Family Background and Academic Success
“One key factor was the support of his principal, Henry Gradillas. ... Gradillas was an academic principal, while his replacement was more interested in other things, such as football and the marching band.”— Stand and Deliver Revisited
“In 1991 Escalante decided to leave Garfield. All his fellow math enrichment teachers soon left as well.”— Stand and Deliver Revisited
“Dr. Juliet Curci (she/her) Project Lead and Principal Investigator Assistant Dean of College Access and Persistence Temple University”— PEDC | CRSE Repository
“Dr. Donna-Marie Cole-Malott (she/her) Project Co-Lead and Co-Facilitator Assistant Professor of Professional and Secondary Education East Stroudsburg University”— PEDC | CRSE Repository
“Significant racial and class inequalities much earlier in life explain persistent obstacles to upward mobility and opportunity.”— Race gaps in SAT scores highlight inequality and hinder upward mobility
“Natalie Prasch, St. Cloud's director of English-learner programs, recruited the Hassan brothers... 'That sense of belonging was the first struggle.'”— How one Minnesota school district handles a rising immigrant population
“"The St. Cloud school district is a long way away from really being a place where all students feel completely welcome," said Jaylani Hussein, the executive director of the council's Minnesota chapter.”— How one Minnesota school district handles a rising immigrant population
“Over 20 years ago, in a highly influential article, Ericsson, Krampe, and Tesch-Römer (1993) proposed that individual differences in performance largely reflect accumulated amount of deliberate practice... Ericsson et al. concluded that “individual differences in ultimate performance can largely be accounted for by differential amounts of past and current levels of practice” (p. 392, emphasis added).”— The Relationship Between Deliberate Practice and Performance in Sports: A Meta-Analysis
Organizations Involved

The Pennsylvania Department of Education issued new regulations in 2022 that required every teacher-preparation program and every professional-development sequence in the state to incorporate nine Culturally Relevant and Sustaining Education competencies. These standards assumed that systemic biases and microaggressions were the primary obstacles to equity and that training teachers to recognize and disrupt them would close achievement gaps. The department mandated that the competencies appear in certification rules, induction programs, and continuing education by 2024. Teacher-education syllabi across Pennsylvania were rewritten to meet the new requirements, and a publicly funded repository of materials was created at Temple University. Growing numbers of observers noted that no evidence had ever shown these practices improved test scores or narrowed gaps. [13][14]

The U.S. Department of Education under President George W. Bush championed the No Child Left Behind Act of 2002 as the civil-rights law of our time. The department issued guidance documents claiming that annual standardized testing would give parents objective data and that accountability would finally close the achievement gap. States were required to submit plans for adequate yearly progress that included every racial and economic subgroup. When many schools, especially those serving low-income and minority students, repeatedly failed to meet the targets, the department prescribed transfers, tutoring, staff replacement, or conversion to charter schools. A decade later the gaps remained essentially unchanged while urban districts complained that the law unfairly punished the very schools that needed the most help. [4][5]

The New York City Department of Education absorbed repeated waves of increased funding under the persistent claim that under-resourcing was the root of poor performance. Per-pupil spending reached nearly $400,000 over the lifetime of a high-school cohort in some analyses, yet proficiency rates on state and national tests stayed stubbornly low. The system continued to cite rising graduation rates as evidence of success even as SAT scores and college-readiness measures declined. By 2024 the city's lowest-performing students had lost ground on the National Assessment of Educational Progress, and the gap between high- and low-income students had widened. The district's experience became a cautionary tale of how the assumption that money alone could equalize outcomes produced expensive failure. [3][9]

▶ Supporting Quotes (23)
“After the communist revolution, the Soviet education system was reformed to equalise school environments as much as possible throughout the Soviet Union. During the 1920s and early 1930s, educational achievement tests showed that some children were still learning more than others. So, in 1936, the USSR banned standardised testing altogether”— Intelligence and Education
“A major reason is that they were never exposed to accurate information in their training. Howard Gardner’s theory of multiple intelligences—despite having little support from psychologists—is widely taught in American teacher training programs”— Intelligence and Education
“After the communist revolution, the Soviet education system was reformed to equalise school environments as much as possible throughout the Soviet Union. ... So, in 1936, the USSR banned standardised testing altogether.”— Intelligence and Education
“To produce one high school graduate with a low-income socioeconomic status costs about $639,000 in today’s dollars.”— If You Can’t Measure It, Can You Improve It?
“The Parents’ Guide to NCLB (US Department of Education, 2003c) states that standardized tests ‘will give them [parents and communities] objective data’ (p. 12).”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“As stated in the policy, NCLB’s goal is to “close the achievement gap with accountability, flexibility, and choice so that no child is left behind” (U.S. Department of Education, 2014, Section 1 Short Title).”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“On the basis of a nationwide survey and evaluation of compensatory education programs, the United States Commission on Civil Rights (1967) came to the following conclusion: ... none of the programs appear to have raised significantly the achievement of participating pupils, as a group, within the period evaluated by the Commission, (p. 138)”— How Much Can We Boost IQ and Scholastic Achievement?
“Congress commissioned the Equality of Educational Opportunity Study as part of the 1964 Civil Rights Act.”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
“The Johnson administration largely succeeded in limiting media coverage to the report’s findings on racial segregation in schools, in part to assist Congressional passage of an extension of the ESEA — legislation that was of questionable value, according to Coleman’s 1966 report.”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
“Although President Lyndon B. Johnson’s Department of Heath, Education, and Welfare drew little attention to “the Coleman Report,” it turned out to be one of the most impactful education reports of the past 50 years.”— The Link Between Family Background and Academic Success
“Only 28% of NYCâs fourth-graders are proficient in reading, compared with 31% nationally. In math, fourth-grade proficiency is 33%, behind the national average of 39%, while eighth-grade math proficiency is just 23%, well below the 28% national rate.”— The âNation’s Report Cardâ Is Out Hereâs What the Results Tell Us About Americaâs Schools
“Unfortunately, too many students and teachers learned the wrong lesson from the movie.”— Stand and Deliver Revisited
“22 Pa. Code § 49.14(4)(i) requires the Pennsylvania Department of Education (PDE) to identify competencies and develop associated standards for educator training in culturally relevant and sustaining education (CR-SE).”— Culturally2023 Relevant and Sustaining Education Program Framework Guidelines
“COMPETENCIES: CULTURALLY RELEVANT AND SUSTAINING EDUCATION (CR-SE)”— Culturally2023 Relevant and Sustaining Education Program Framework Guidelines
“In April 2023, the Pennsylvania State Board of Education included the following language in its amendments to Chapter 49 of the Pennsylvania Code (relating to the Certification of Professional Personnel)”— PEDC | CRSE Repository
“In 2022, the William Penn Foundation awarded a grant to Temple University’s College of Education and Human Development to support the implementation of the CRSE Competencies in teacher education in Pennsylvania.”— PEDC | CRSE Repository
“The PA Teacher Education Culturally Relevant and Sustaining Education (CRSE) Initiative’s Repository is a collaboration between Temple University and the Pennsylvania Educator Diversity Consortium”— PEDC | CRSE Repository
“Our analysis uses both the College Board’s descriptive statistics for the entire test-taking class, as well as percentile ranks by gender and race.”— Race gaps in SAT scores highlight inequality and hinder upward mobility
“The district has ramped up its efforts to recruit Somali residents, like the brothers, who can relate to the students... Districtwide, school lunch menus provide pork-free options for students, and staff members try to spur the newcomer students' interest in sports, culture clubs, and other extracurricular activities.”— How one Minnesota school district handles a rising immigrant population
“The Minnesota chapter of the Council on American-Islamic Relations filed a federal civil rights complaint against the St. Cloud school district in 2011, alleging a hostile environment for the district's Somali students that included widespread and frequent harassment based in large measure, on religion.”— How one Minnesota school district handles a rising immigrant population
“This year’s executive budget boosted state aid to more than $34 billion... The budget provided enough money to ‘fully fund‘ the foundation aid formula, which lawmakers touted as a major accomplishment.”— School’s Out and Session’s Out – What Happened this Year? - Empire Center for Public Policy
“With plans to overhaul the state’s academic standards by 2025, the Board of Regents and their Technical Advisory Committee (TAC) began the process this year by lowering the bar for student achievement... adjusting cut-scores on state assessments... to better reflect a “new normal.” What is their idea of a new normal? Test scores from school year 2021-22.”— School’s Out and Session’s Out – What Happened this Year? - Empire Center for Public Policy
“Sports have been used more than any other domain to study the relationship between deliberate practice and performance. This makes it possible to evaluate moderator effects with a higher level of statistical power and precision than in other domains.”— The Relationship Between Deliberate Practice and Performance in Sports: A Meta-Analysis
The Foundation

The strongest version of the assumption rested on a reasonable intuition backed by real observations. In the 1960s many black children attended visibly inferior schools in the segregated South, and poor children everywhere entered kindergarten with smaller vocabularies and less exposure to books. Civil-rights leaders and social scientists therefore concluded that equalizing school resources, desegregating classrooms, and providing compensatory programs would substantially close achievement gaps. The deprivation hypothesis seemed especially persuasive: if social and economic disadvantages caused academic lag, then removing those disadvantages should produce equal outcomes. Early data on rising high-school graduation rates and the apparent success of programs such as Head Start appeared to support the view. A thoughtful observer at the time could be forgiven for believing that schools, given enough money and the right policies, could largely overcome differences in student ability. [6][7][18]

Yet the data began to shift almost immediately. Arthur Jensen's 1969 analysis showed that compensatory programs produced only short-term IQ gains that faded by third grade and that heritability of intelligence reached 0.80 in adulthood. The Coleman Report of 1966, commissioned to document school inequality, instead found that family background explained most of the variation in achievement and that measured school differences accounted for little once family factors were controlled. Subsequent twin studies, adoption studies, and genome-wide analyses confirmed that genetic factors explained the majority of variance in cognitive ability within wealthy countries. Even the much-cited 10,000-hour deliberate-practice model, when subjected to meta-analysis in sports and other domains, accounted for far less variance than its proponents had claimed. Growing evidence suggests the original assumption overstated the power of equalized environments and understated stable individual differences. [1][6][10][19]

Policymakers also placed great faith in per-pupil spending as the primary metric of school quality. Decades of steady increases in funding were justified on the grounds that more money would buy smaller classes, better facilities, and higher-quality instruction. NAEP data, however, showed no consistent correlation between spending and proficiency once family background was taken into account. The same pattern appeared with Common Core standards, which were promoted as a way to raise achievement by aligning curricula nationwide; scores stagnated or declined in most states after implementation. The assumption that equal inputs would produce equal outputs proved durable in policy circles even as replication after replication failed to support it. [3][9]

▶ Supporting Quotes (42)
“Almost 85 percent endorsed Howard Gardner’s theory of multiple intelligences. Almost forty percent thought that “street smarts” were more important for life success than intelligence. All of these beliefs are completely incorrect”— Intelligence and Education
“[I]n industrialised nations, about ninety percent of differences in learning outcomes are associated with individual differences among students. This means that only about ten percent of differences in learning outcomes are related to school- and classroom-level characteristics”— Intelligence and Education
“In a British survey, only 29 percent of teachers thought that genes were one of the top three factors affecting student achievement. In other words, the scientific research shows that genes are usually more important than every environmental cause combined”— Intelligence and Education
“One of the most consistent findings in psychology is that intelligence—as measured by IQ—is the best predictor of educational outcomes… Over 85 percent believed that it was too simplistic to measure someone’s intelligence with just one score, like an IQ. Almost 85 percent endorsed Howard Gardner’s theory of multiple intelligences. ... All of these beliefs are completely incorrect”— Intelligence and Education
“In wealthy, industrialised countries, it approaches .80 in adults, which indicates that eighty percent of individual differences in IQ are associated with individual genetic differences. ... In a British survey, only 29 percent of teachers thought that genes were one of the top three factors affecting student achievement.”— Intelligence and Education
“Per-pupil expenditures can tell what a system costs but says nothing about what it delivers.”— If You Can’t Measure It, Can You Improve It?
“You might examine recent public high school graduation rates—which increased from less than 60% in 2013 to 80% in 2024... But if instead, you look at SAT participation and scores from the same cohort and period—which have fallen in all but one year since 2018”— If You Can’t Measure It, Can You Improve It?
“Like other proponents of standards and testing, NCLB presumes a particular view of knowledge and research, presumes that the standards have been objectively determined and that standardized tests provide a valid and reliable means of assessing student learning. NCLB also explicitly presumes that teachers cannot be trusted to assess student learning.”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“President Bush promoted NCLB as a means of replicating at the federal level the ‘success’ previously achieved at the state level, such as in Texas (where he was governor) and New York.”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“AYP is a combination of a state’s total student proficiency rate and the rate achieved by student subgroups. NCLB defines subgroups as students who are in special education, English-language learners, racial minorities, and/or disadvantaged children (Klein, 2014b).”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“However, a recent study has shown that the achievement gap is more accurately measured by income rather than race (Reardon, 2011). Once income is controlled for the achievement gap has actually narrowed, but when comparing achievement between high and low-income students, the achievement gap has gotten larger over the years (Reardon, 2011).”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“the “deprivation hypothesis,” according to which academic lag is mainly the result of social, economic, and educational deprivation and discrimination— an hypothesis that has met with wide, uncritical acceptance”— How Much Can We Boost IQ and Scholastic Achievement?
“The "average children" concept is essentially the belief that all children, except for a rare few born with severe neurological defects, are basically very much alike in their mental development and capabilities”— How Much Can We Boost IQ and Scholastic Achievement?
“disparities favoring white children in some resources like class size, school facilities and the availability of advanced coursework, and heavy race-based inequality on tests of academic achievement.”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
“Surprising to many, however, was the news that that schools serving black and white children did not look very different on a bundle of other measures, including the age of school facilities and textbooks, the availability of extracurricular clubs, and many teacher and principal characteristics.”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
“Even more surprising was Coleman’s assertion that inequities in school resources did not explain the observed inequalities in average student achievement.”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
“This surprising finding didn’t fit with the dominant civil rights argument of the day, prompting some to question the validity of the report’s findings.”— The Link Between Family Background and Academic Success
“Parental education is regularly identified as the single strongest predictor of a child’s academic success.”— The Link Between Family Background and Academic Success
“More funding has not made a difference. Even as national per-pupil spending has exceeded $17,000 on average per student, reading proficiency has remained unchanged, and math scores are at their lowest in two decades.”— The âNation’s Report Cardâ Is Out Hereâs What the Results Tell Us About Americaâs Schools
“While No Child Left Behind (NCLB) drove improvements in student achievement initially, NAEP scores indicate that progress stalled under Common Core implementation.”— The âNation’s Report Cardâ Is Out Hereâs What the Results Tell Us About Americaâs Schools
“For example, some wonder whether the reason identical twins are so similar is actually because people treat them more similarly. Parents might, for instance, dress them in matching clothes.”— Intelligence: All That Matters
“The ‘shared’ environment covers all the things that might make a pair of twins more similar to each other: parenting style, the number of books in the home, the social class of the neighbourhood, and more.”— Intelligence: All That Matters
“Heritability doesn’t say that 50 per cent of an individual person’s intelligence is due to their DNA. The heritability estimate is a group figure, describing the reasons for the variance in intelligence among the sample of people studied.”— Intelligence: All That Matters
“Heritability doesn’t tell us anything about the average level of intelligence. Intelligence can be 50 per cent heritable in a group where the average IQ is 85, 100, 115 or any other number.”— Intelligence: All That Matters
“‘Heritable’ doesn’t mean the same thing as ‘hereditary’. These words are often confused: a ‘hereditary’ trait is simply anything that’s passed on from parents to offspring, whereas ‘heritability’ is about the genetic variation in that trait.”— Intelligence: All That Matters
“Stand and Deliver shows a group of poorly prepared, undisciplined young people who were initially struggling with fractions yet managed to move from basic math to calculus in just a year. The reality was far different. It took 10 years to bring Escalante's program to peak success.”— Stand and Deliver Revisited
“Escalante did not approve of programs for the gifted, academic tracking, or even qualifying examinations. If students wanted to take his classes, he let them.”— Stand and Deliver Revisited
“Culturally-Relevant and Sustaining Education (CR-SE): Education that ensures equity for all students and seeks to eliminate systemic institutional racial and cultural barriers that inhibit the success of all students in this Commonwealth—particularly those who have been historically underrepresented.”— Culturally2023 Relevant and Sustaining Education Program Framework Guidelines
“Believe and acknowledge that microaggressions are real and take steps to educate themselves about the subtle and obvious ways in which they are used to harm and invalidate the existence of others.”— Culturally2023 Relevant and Sustaining Education Program Framework Guidelines
“Know and acknowledge that biases exist in the educational system.”— Culturally2023 Relevant and Sustaining Education Program Framework Guidelines
“There are nine Culturally Relevant and Sustaining Education (CRSE) Competencies that inform the preparation and professional development of teachers and other educators in Pennsylvania.”— PEDC | CRSE Repository
“At the core of CRSE is an anti-racist undertaking that aims to eliminate the systemic and institutional barriers that inhibit the success of all Pennsylvania’s students—particularly those who have been historically marginalized.”— PEDC | CRSE Repository
“Yet despite efforts to equalize academic opportunity, large racial gaps in SAT scores persist. ... Disappointingly, the black-white achievement gap in SAT math scores has remained virtually unchanged over the last fifteen years.”— Race gaps in SAT scores highlight inequality and hinder upward mobility
“The Hassan brothers are on the front lines of St. Cloud's efforts to better serve its ever-expanding English-learner population and integrate the Somali community... Despite recognition from the U.S. Department of Education for its efforts to educate ELLs, the district hasn't been able to close a yawning achievement gap.”— How one Minnesota school district handles a rising immigrant population
“In its high schools, St. Cloud has "English Academy" courses designed to aid newcomer English-learners... Teachers and Somali staff members alike say the students who've had little to no experience with schooling are easy to spot. To address their needs initially, more time is spent focusing on structure and order.”— How one Minnesota school district handles a rising immigrant population
“the formula is based on outdated population statistics from the 2000 census, not accurately tied to yearly enrollment figures, and still provides more than enough funding to high-revenue districts while short-changing impoverished schools.”— School’s Out and Session’s Out – What Happened this Year? - Empire Center for Public Policy
“New York ranks #1 in the nation when it comes to spending on education. The state’s per-student spending, which rose to $26,571 in 2021, was 85 percent above the national average... School aid has risen 76 percent since 2012 — while public school enrollment has fallen more than 5 percent”— School’s Out and Session’s Out – What Happened this Year? - Empire Center for Public Policy
“In the 1960s, racial egalitarians routinely blamed the test score gap on the combined effects of black poverty, racial segregation, and inadequate funding for black schools. That analysis implied obvious solutions: raise black children's family income, desegregate their schools, and equalize spending on schools that remain racially segregated.”— The Black-White Test Score Gap
“Despite glaring economic inequalities between a few rich suburbs and nearby central cities, the average black child and the average white child now live in school districts that spend almost exactly the same amount per pupil.”— The Black-White Test Score Gap
“The number of affluent black parents has grown substantially since the 1960s, but their children's test scores still lag far behind those of white children from equally affluent families.”— The Black-White Test Score Gap
“Ericsson et al. recruited musicians from different levels of accomplishment... on average, the “best” violinists had accumulated over 10,000 hr of deliberate practice, compared with less than 8,000 hr for the “good” violinists and not even 5,000 hr for the least accomplished “teachers.””— The Relationship Between Deliberate Practice and Performance in Sports: A Meta-Analysis
“Another major finding was that athletes who reached a high level of skill did not begin their sport earlier in childhood than lower skill athletes. This finding challenges the notion that higher skill performers tend to start in a sport at a younger age than lower skill performers.”— The Relationship Between Deliberate Practice and Performance in Sports: A Meta-Analysis
How It Spread

Teacher-training programs became the most effective vector for the assumption. Large majorities of future educators were taught that IQ tests were too simplistic, that Howard Gardner's multiple-intelligences theory offered a better framework, and that genetic differences played at most a minor role in achievement. Some programs actively discouraged discussion of heritability data. The result was a generation of teachers who entered classrooms convinced that any child could reach the same level with the right environment and enough encouragement. [1]

Federal and state policy amplified the message. The No Child Left Behind Act passed with broad bipartisan support in 2001 because it promised to close racial and economic gaps through testing and accountability. The Department of Education and civil-rights organizations framed the law as the next logical step after desegregation. Media coverage emphasized inspirational stories such as the film Stand and Deliver, which was screened in education classes as proof that dedicated teachers could overcome any deficit in a single year. Meanwhile, the Coleman Report's inconvenient findings were quietly shelved. [4][5][11]

The assumption also spread through funding formulas and regulatory mandates. States increased school aid on the theory that equalized spending would equalize outcomes. Pennsylvania's 2022 mandate that every teacher-preparation program incorporate Culturally Relevant and Sustaining Education competencies assumed that training teachers to recognize systemic bias would remove barriers to equity. The Pennsylvania Department of Education and partner universities created repositories and communities of practice to ensure the new orthodoxy reached every classroom. Each new layer of policy and training reinforced the belief that schools could make students substantially more equal. [13][14][17]

▶ Supporting Quotes (25)
“One of my students and I surveyed a sample that included 200 American teachers to learn about their knowledge and opinions about intelligence. The results showed that teachers sometimes had an appalling lack of understanding about intelligence. Over 85 percent believed that it was too simplistic to measure someone’s intelligence with just one score, like an IQ”— Intelligence and Education
“Sometimes, teacher training programs even work to keep information about intelligence and IQ from their students…”— Intelligence and Education
“Howard Gardner’s theory of multiple intelligences—despite having little support from psychologists—is widely taught in American teacher training programs. ... Sometimes, teacher training programs even work to keep information about intelligence and IQ from their students…”— Intelligence and Education
“Depending on what one reads or to whom one listens, the public is told the following: ... We spend not nearly enough on public education—or way too much.”— If You Can’t Measure It, Can You Improve It?
“When No Child Left Behind (NCLB) became law in 2002, it passed the Senate and House with large majorities1 and has led to the largest intervention by the federal government into education in the history of the United States.”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“Paige, in response to an Organisation for Economic Co-operation and Development report, stated: This report documents how little we receive in return for our national investment. This report also reminds us that we are battling two achievement gaps. One is between those being served well by our system and those being left behind. The other is between the US and many of our higher achieving friends around the world.”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“NCLB requires states to annually test students in reading and mathematics in grades 3-8, and once in grades 10-12 (Federal Education Budget, 2014). In addition, states must also test students in science once in grades 3-5, 6-8, and 10-12 (Federal Education Budget, 2014).”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“This system is highly controversial as no national standards were established. Instead of giving a basis for comparison of public schools across the country, AYP is 50 viewpoints of where to set the bar, 50 versions of measuring the distance to the bar, and 50 different manipulations of statistics about how many students are above, at or below the bar.”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“It had theoretical sanction from social scientists espousing the major underpinning of its rationale: the “deprivation hypothesis,” ... an hypothesis that has met with wide, uncritical acceptance in the atmosphere of society’s growing concern about the plight of minority groups and the economically disadvantaged.”— How Much Can We Boost IQ and Scholastic Achievement?
“Although this sharply contradicted the orthodoxy in both academic and policy circles”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
“the achievement gap had been kept quiet, “sort of like your demented aunt in the attic,” according to Cohen.”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
“Since the report’s release, others have questioned the ability ofColeman’s research methodto answer causal questions.”— The Link Between Family Background and Academic Success
“Even with record-high education spending per student in some states, such as New York, student achievement remains low, demonstrating that funding alone does not drive academic success.”— The âNation’s Report Cardâ Is Out Hereâs What the Results Tell Us About Americaâs Schools
“This period coincided with the Department of Education adopting Common Core Standards, which focused on a standardized curriculum and reduced direct accountability for schools and teachers.”— The âNation’s Report Cardâ Is Out Hereâs What the Results Tell Us About Americaâs Schools
“‘Nurture’ implies parenting, but non-genetic effects on intelligence are far broader than that. For this reason, even though the phrase ‘nature versus nurture’ is used regularly, it confuses more than it explains”— Intelligence: All That Matters
“For more than a decade it has been a staple in high school classes, college education classes, and faculty workshops.”— Stand and Deliver Revisited
“Chapter 49 requires instruction in CR-SE to be integrated in educator preparation, induction, and continuing professional development programs as follows: Continuing professional development programs must integrate the CR-SE competencies no later than the 2023-24 academic year. Educator preparation and induction programs must integrate CR-SE competencies no later than the 2024-25 academic year.”— Culturally2023 Relevant and Sustaining Education Program Framework Guidelines
“Between August 2022 and June 2023, through monthly meetings and independent exercises, participants in the “CRSE Community of Practice” explored, reflected upon, and ultimately integrated into a teacher education course or program element the Culturally Relevant and Sustaining Education (CRSE) Competencies.”— PEDC | CRSE Repository
“We hope that the materials included in this repository support the critical advancement of culturally relevant and sustaining education across the educational landscape in Pennsylvania and beyond.”— PEDC | CRSE Repository
“The SAT provides a measure of academic inequality at the end of secondary schooling. Moreover, insofar as SAT scores predict student success in college, inequalities in the SAT score distribution reflect and reinforce racial inequalities across generations.”— Race gaps in SAT scores highlight inequality and hinder upward mobility
“A 2011 settlement ending a federal civil rights investigation of the treatment of Somali students in St. Cloud requires the school district to report all allegations of harassment... Despite recognition from the U.S. Department of Education for its efforts to educate ELLs.”— How one Minnesota school district handles a rising immigrant population
“The public was told repeatedly that scores from that year were not an accurate representation of how students and schools were doing. Now, officials are using those scores as the basis for adjusting standards without explaining what methodology or data will inform this process.”— School’s Out and Session’s Out – What Happened this Year? - Empire Center for Public Policy
“In the 1960s, racial egalitarians routinely blamed the test score gap on the combined effects of black poverty, racial segregation, and inadequate funding for black schools.”— The Black-White Test Score Gap
“Who becomes a success in music, sports, games, business, and other domains? This is a question that parents, teachers, coaches, talent scouts, and search committees all seek to answer... Ericsson et al. (1993) has been cited over 5,000 times (source: Google Scholar).”— The Relationship Between Deliberate Practice and Performance in Sports: A Meta-Analysis
“Connecticut, Massachusetts, and New Jersey all undertook major reforms of their school finance systems several decades ago and all saw dramatic gains in achievement with reductions in achievement gaps within a decade”— Equalizing School Spending Boosts Lifelong Income
Resulting Policies

The No Child Left Behind Act of 2002 required states to test nearly all students in reading and math in grades three through eight and once in high school. Schools that failed to make adequate yearly progress for two consecutive years faced sanctions that escalated from offering transfers to replacing staff or converting to charter schools. President George W. Bush and Secretary Rodney Paige promoted the law as a way to replicate Texas's apparent success and finally close the achievement gap. The target was 100 percent proficiency by 2014. Most states never came close, and the law was later replaced amid widespread complaints that it unfairly punished schools serving disadvantaged students. [4][5]

Congress passed the Elementary and Secondary Education Act in 1965 on the assumption that extra funding for poor schools would eliminate resource gaps that caused achievement differences. The Johnson administration downplayed the Coleman Report's finding that family background mattered more and continued to expand the program. Billions were spent on compensatory education projects such as Head Start, Higher Horizons, and More Effective Schools. Evaluations by the U.S. Commission on Civil Rights and other bodies later found no lasting gains in IQ or academic achievement for the groups targeted. [6][7]

States and districts poured additional resources into equalizing spending and implementing new curricula. New York City increased per-pupil spending dramatically while claiming chronic underfunding. Common Core standards were adopted by most states with federal incentives and were expected to raise proficiency by aligning instruction. Pennsylvania rewrote teacher-certification rules to require Culturally Relevant and Sustaining Education training. Court-ordered desegregation plans, especially in the South in the 1970s, were justified on the grounds that mixing students would close test-score gaps. In each case the policies rested on the belief that equalized environments could substantially narrow individual differences. [9][13][18]

▶ Supporting Quotes (22)
“So, in 1936, the USSR banned standardised testing altogether. It was much easier to ban the tests and hide individual differences than it was to actually eliminate them…”— Intelligence and Education
“It is simply impossible for a single teacher to prepare lessons in every subject that allow every student to learn new information. Some sort of ability grouping, in which students at similar levels of achievement are taught together, is necessary... [T]here is no evidence that grade skipping creates any harms—academically, socially, or otherwise—for children”— Intelligence and Education
“In 2023, the U.S. dedicated nearly $1 trillion in combined state, local, and federal funding to K–12 education, more than any other program aside from major entitlements.”— If You Can’t Measure It, Can You Improve It?
“From kindergarten through high school, New York City on average spent nearly $400,000 per student in current dollars, or approximately $30,000 per year for the 2013–17 traditional high school cohort examined in this report.”— If You Can’t Measure It, Can You Improve It?
“NCLB requires that 95% of students in grades 3 through 8 and once in high school be assessed through standardized tests aligned with ‘challenging academic standards’ in math, reading and (beginning in 2007–08) science (US Department of Education, 2003c, p. 4).”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“If schools do not make adequate yearly progress for two consecutive years, they must be identified as schools ‘in need of improvement.’ Students in those schools must be given the option of transferring to another public school (US Department of Education, 2003c, p. 9). Additional requirements are imposed for each successive year that a school fails to meet adequate yearly progress goals.”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“NCLB was a reauthorization of the Elementary and Secondary Act of 1965 (ESEA), which was part of Lyndon B. Johnson’s War on Poverty campaign.”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“Compensatory education has been practiced on a massive scale for several years in many cities across the nation. It began with auspicious enthusiasm and high hopes of educators. It had unprecedented support from Federal funds.”— How Much Can We Boost IQ and Scholastic Achievement?
“the Elementary and Secondary Education Act, intended to provide aid to impoverished schools, had passed Congress in 1965 in part to alleviate this gap.”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
“New York City (NYC), the nation’s largest urban district, continues to struggle with low proficiency rates in reading and math despite decades of reform efforts and the highest per-pupil spending in the country.”— The âNation’s Report Cardâ Is Out Hereâs What the Results Tell Us About Americaâs Schools
“Between 2013 and 2019, progress stagnated and even began to decline. Only two states (California and Mississippi) showed a 5-percentage-point increase in fourth-grade reading.”— The âNation’s Report Cardâ Is Out Hereâs What the Results Tell Us About Americaâs Schools
“This Hollywood message had a pernicious effect on teacher training. The lessons of Escalante's patience and hard work in building his program, especially his attention to the classes that fed into calculus, were largely ignored in the faculty workshops and college education classes that routinely showed Stand and Deliver to their students.”— Stand and Deliver Revisited
“He told PBS that the order instilled in schools during his time as a pupil had fallen apart, adding that years of bussing following the Brown ruling had destroyed the sense of community.”— How Baton Rouge school plagued by racial tensions and violence drove military veteran to spearhead successful campaign for wealthy white residents to form new city of St George
“On April 23, 2022, the final form amendments to Chapter 49 (relating to Certification of Professional Personnel) of Title 22 of the Pennsylvania Code became effective upon publication in the Pennsylvania Bulletin.”— Culturally2023 Relevant and Sustaining Education Program Framework Guidelines
“Continuing professional development programs must integrate the CR-SE competencies no later than the 2023-24 academic year.”— Culturally2023 Relevant and Sustaining Education Program Framework Guidelines
“These competencies must be integrated into teacher education programs by 2025 and into school districts’ in-service teacher professional development by 2024, as stipulated by Pennsylvania’s State Board of Education and Department of Education.”— PEDC | CRSE Repository
“Shared within this site are original and revised course syllabi and program element documents”— PEDC | CRSE Repository
“Accordingly, policy efforts may be more effective if they target underlying sources of these achievement gaps. That means experimenting with earlier childhood interventions ... increasing cash transfers to disadvantaged parents with young children, improving access to quality preschool programs, pursuing paid leave policies.”— Race gaps in SAT scores highlight inequality and hinder upward mobility
“In St. Cloud's middle and high schools, the district allows prayer time for students... The district has partnered with the University of Minnesota to develop uniforms for female athletes who wear hijab... Under the agreement, the district must make its schools more welcoming to Somalis.”— How one Minnesota school district handles a rising immigrant population
“School aid has risen 76 percent since 2012 — while public school enrollment has fallen more than 5 percent... Governor Hochul signed into law a class size bill requiring all NYC schools to reduce their teacher-pupil ratio over the next five years. This will require an estimated $1.3 billion annually”— School’s Out and Session’s Out – What Happened this Year? - Empire Center for Public Policy
“Most southern schools desegregated in the early 1970s, and southern black nine-year-olds' reading scores seem to have risen as a result.”— The Black-White Test Score Gap
“increasing per-pupil spending by 10% in all 12 school-age years increased the probability of high school graduation by 7 percentage points for all students and roughly 10 percentage points for low-income children”— Understanding the Effects of School Funding
Harm Caused

The financial cost was enormous. New York City spent roughly $400,000 per student over the lifetime of one high-school cohort and nearly $2.2 million per low-income student who reached an associate or bachelor's degree, yet proficiency rates remained low and gaps widened. Nationwide, K-12 education received nearly $1 trillion in 2023, far outstripping spending on defense or infrastructure, with little measurable return in closing achievement gaps. Taxpayers footed the bill for repeated waves of reform that produced stagnant or declining NAEP scores. [3][9]

Students paid a different price. Mixed-ability classrooms left teachers trying to instruct children whose math and reading levels spanned six grade levels in a single fifth-grade class. High-ability students were held back while low-ability students received material they could not master. Urban schools serving disadvantaged populations faced sanctions under No Child Left Behind that narrowed the curriculum and demoralized staff without addressing the underlying differences children brought to school. Persistent gaps in SAT scores, with black students averaging 428 on math compared with 534 for white students, limited college and career options for hundreds of thousands of young people. [1][5][15]

Entire communities suffered when the assumption collided with reality. In Baton Rouge, post-desegregation violence and academic failure at schools such as Woodlawn led to 61 arrests in a single year, repeated racial brawls captured on video, and a successful campaign by wealthier residents to secede and form the new city of St. George. The secession cost the remaining district $48 million in annual tax revenue, further harming the poorer, mostly black students left behind. Similar patterns of disillusionment and resource misallocation appeared in districts that had bet heavily on integration, increased spending, or bias-training programs that never delivered the promised equalization. [12]

▶ Supporting Quotes (34)
“By 5th grade, the average American classroom has children whose achievement in mathematics and reading ranges from the 2nd grade level to the 8th grade level or higher. It is simply impossible for a single teacher to prepare lessons in every subject that allow every student to learn new information”— Intelligence and Education
“We devote a lot of resources to trying to equalise student outcomes. However, when schools have a good curriculum and experienced teachers, individual differences in student achievement widen. Yes, struggling students do perform slightly better—but the most able students show greater gains”— Intelligence and Education
“when schools have a good curriculum and experienced teachers, individual differences in student achievement widen... By 5th grade, the average American classroom has children whose achievement in mathematics and reading ranges from the 2nd grade level to the 8th grade level or higher. It is simply impossible for a single teacher to prepare lessons... [I]n industrialised nations, about ninety percent of differences in learning outcomes are associated with individual differences among students.”— Intelligence and Education
“[T]here is no evidence that grade skipping creates any harms—academically, socially, or otherwise—for children... Most educators are shocked when I tell them that up to a quarter of American students could skip their final year of high school…”— Intelligence and Education
“To yield an eventual single associate’s or B.A. degree recipient from that same low-income cohort, the NYC public school system expended approximately six times the amount spent per pupil, $2.2 million in constant 2025 dollars.”— If You Can’t Measure It, Can You Improve It?
“The 2024 National Assessment of Educational Progress—known as the “Nation’s Report Card”… shows 12th-graders’ performance slipping to a record low.… leaving many unprepared for life after high school”— If You Can’t Measure It, Can You Improve It?
“However, as I will show, to date NCLB has failed to live up to its promises and may exacerbate inequality.”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“NCLB, by standardizing curriculum and assessment, undermines the kinds of reforms which have occurred over the last several decades, such as small schools, authentic formative assessments and interdisciplinary curriculum, that have improved students’ learning, particularly students in urban schools.”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“Furthermore, because NCLB aims to and focuses on what occurs in schools rather than the wider society, it diverts our attention from the issues that must be tackled if we are to improve all students’ learning and develop a more equitable society.”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“In 2013, fewer than half of the nation’s public school students scored at or above proficiency levels for reading and mathematics (National Center for Education Statistics, 2013a). In fact, the nation’s fourth grade average for reading proficiency was a shocking 35 percent (National Center for Education Statistics, 2013b).”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“In fourth grade, 54 percent of White children scored at or above the mathematic proficiency level in 2013, while only 18 and 26 percent of Black and Hispanic children scored at or above proficiency level, respectively (National Center for Education Statistics, 2013a).”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“Ironically, the schools that NCLB aimed to help the most—those with high diversity and low-socioeconomic demographics—have suffered the worst as a result of unfair accountability standards and sanctions.”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“The chief goal of compensatory education— to remedy the educational lag of disadvantaged children and thereby narrow the achievement gap between “minority” and “majority” pupils— has been utterly unrealized in any of the large compensatory education programs that have been evaluated so far.”— How Much Can We Boost IQ and Scholastic Achievement?
“legislation that was of questionable value, according to Coleman’s 1966 report.”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
““Holy mackerel, what are you going to do when school’s not working?” Marshall “Mike” Smith, a principal data analyst for a subsequent reexamination of Coleman’s results, recalled thinking.”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
“the lowest percentage of students experiencing a suspension at any stage in their educational career is observed among 12-to 17- year olds living with two married parents (5.3 percent), whereas the highest percentage is observed for children living with a guardian (13.8 percent).”— The Link Between Family Background and Academic Success
“Children born to a mother who lives within two miles of a hazardous waste site are 7.4 percentage points more likely to repeat a grade, are 6.6 percentage points more likely to be suspended from school, and have lower test scores. Those living within just one mile of a hazardous waste site are also 10 percentage points more likely to have a cognitive disability.”— The Link Between Family Background and Academic Success
“Between 2013 and 2024, the lowest-performing public school students (25th percentile) lost an average of 12 points, compared with an 8-point decline among charter school students.”— The âNation’s Report Cardâ Is Out Hereâs What the Results Tell Us About Americaâs Schools
“Among eighth-grade students, not a single state achieved a 5-percentage-point gain in reading or math.”— The âNation’s Report Cardâ Is Out Hereâs What the Results Tell Us About Americaâs Schools
“By 1996, the dynasty was not even a minor fiefdom. Only seven students passed the regular ("AB") test that year, with four passing the BC exam -- 11 students total, down from a high of 85.”— Stand and Deliver Revisited
“Garfield was a three-year high school, and the junior high schools that fed it offered only basic math. ... Escalante established a program at East Los Angeles College where students could take these classes in intensive seven-week summer sessions.”— Stand and Deliver Revisited
“On May 3, 2013, violence erupted in the hallways of Woodlawn High School. As many as six separate fights between unruly students broke out that day - part of an annus horribilis that saw 61 arrests made at the racially diverse school in Baton Rouge, Louisiana.”— How Baton Rouge school plagued by racial tensions and violence drove military veteran to spearhead successful campaign for wealthy white residents to form new city of St George
“They argued that St George would siphon over $48million in annual tax revenue from the city-parish government, with devastating effects for East Baton Rouge and its poorer black population.”— How Baton Rouge school plagued by racial tensions and violence drove military veteran to spearhead successful campaign for wealthy white residents to form new city of St George
“Identify and make efforts to remove bias in their teaching materials, assignments, curriculum, and resource allocation.”— Culturally2023 Relevant and Sustaining Education Program Framework Guidelines
“(The materials included in this repository are the intellectual property of the faculty contributors and may not, at this time, have institutional approval for inclusion within program curricula.)”— PEDC | CRSE Repository
“These gaps have a significant impact on life chances, and therefore on the transmission of inequality across generations. ... We estimate that in the entire country last year at most 2,200 black and 4,900 Latino test-takers scored above a 700.”— Race gaps in SAT scores highlight inequality and hinder upward mobility
“Talahi Elementary, where roughly 45 percent of students are Somali, is a state "priority school," a label attached to Minnesota's most persistently low-performing Title I schools. With test scores among the bottom 5 percent in the state.”— How one Minnesota school district handles a rising immigrant population
“Last spring, racial and religious tensions at Technical High School erupted when students and parents, most of them Somali, alleged that school officials did not adequately respond to bullying incidents and anti-Islamic discrimination.”— How one Minnesota school district handles a rising immigrant population
“less than half of students scored proficient on our state’s own grade 3-8 assessments, with some districts scoring at 0% proficiency for entire grade levels... Rates of chronic absenteeism are on the rise, especially in New York City, where nearly half of all students missed 18 or more days of school last year... increasing numbers of CUNY freshman were already in need of remedial classes”— School’s Out and Session’s Out – What Happened this Year? - Empire Center for Public Policy
“The state will be spending about $9 billion more on a smaller number of students than it would have if school aid had simply kept pace with inflation... the policy might result in allocating resources to higher-performing schools simply because they are out of compliance”— School’s Out and Session’s Out – What Happened this Year? - Empire Center for Public Policy
“For all these reasons, the number of people who think they know how to eliminate racial differences in test performance has shrunk steadily since the mid-1960s.”— The Black-White Test Score Gap
“But pessimism about this has become almost universal.”— The Black-White Test Score Gap
“We conclude that to understand the underpinnings of expertise, researchers must investigate contributions of a broad range of factors, taking into account findings from diverse subdisciplines of psychology (e.g., cognitive psychology, personality psychology) and interdisciplinary areas of research (e.g., sports science).”— The Relationship Between Deliberate Practice and Performance in Sports: A Meta-Analysis
“Only 18 states provide at least 10% more funding to high-poverty districts than low-poverty districts, and nearly one third provide less funding to high-poverty school districts than low-poverty districts”— A Quality Approach to School Funding
Downfall

The assumption began to lose credibility in the late 1960s when the Coleman Report showed that school resources explained little of the achievement gap once family background was taken into account. Arthur Jensen's 1969 paper laid out the heritability data and the repeated failure of compensatory programs to produce lasting gains. Both documents were attacked or ignored, but the empirical pattern held. Twin studies, adoption studies, and later genomic analyses kept returning the same result: in wealthy countries, roughly 80 percent of the variance in adult IQ is associated with genetic factors. [1][6][7][10]

Large-scale assessments delivered the next blows. NAEP results from 2013 to 2024 showed stagnation or decline despite record spending and the implementation of Common Core. No Child Left Behind's adequate-yearly-progress metrics produced inconsistent state data and failed to move national proficiency anywhere near the 100-percent target. The black-white SAT gap remained essentially unchanged for nearly two decades. Meta-analyses of deliberate practice found it explained far less variance in expert performance than its original proponents had claimed. [9][15][19]

By the 2020s a growing body of evidence had accumulated that schools explain only about 10 percent of differences in student outcomes and that individual factors, including genetics, dominate the rest. Pennsylvania's costly experiment with mandatory Culturally Relevant and Sustaining Education training produced no documented improvement in test scores. The assumption that equalized environments could make all students substantially equal is increasingly recognized as flawed, though the debate is not yet settled among all educators and policymakers. The chronicle of institutional failure remains visible in stagnant scores, wasted budgets, and the quiet acknowledgment that some differences are more stubborn than the reformers of the 1960s ever wanted to believe. [1][13][17]

▶ Supporting Quotes (25)
“One of the most consistent findings in psychology is that intelligence—as measured by IQ—is the best predictor of educational outcomes… In wealthy, industrialised countries, it approaches .80 in adults, which indicates that eighty percent of individual differences in IQ are associated with individual genetic differences”— Intelligence and Education
“One of the most consistent findings in psychology is that intelligence—as measured by IQ—is the best predictor of educational outcomes… As psychologist Arthur Jensen stated over fifty years ago, “A philosophy of equalization, however laudable its ideals, cannot work if it is based on false premises, and no amount of propaganda can make it appear to work. Its failures will be forced upon everyone.””— Intelligence and Education
“six times the number of college graduates for the same funding as NYC district public schools, a multiple that grows to nearly nine times when comparing low-income students only.”— If You Can’t Measure It, Can You Improve It?
“However, NCLB promises more than it delivers. First, adequate yearly progress indicators provides little information on whether schools are making progress but, instead, serve to unfairly punish urban schools, the schools mostly likely to serve”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“to date NCLB has failed to deliver as promised and, given the specifics of the law, there is no reason to think that it will or can.”— Exacerbating inequality: the failed promise of the No Child Left Behind Act
“What may be most disturbing, however, is that the achievement gap has remained stubbornly consistent for well over a decade. Scores from both 2000 and 2007 are nearly identical to those of 2009 (National Center for Education Statistics, 2011b).”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“For example, in 2004 the state of Kentucky reported that 94 percent of schools met AYP requirements. However, when researchers manipulated the Kentucky data using a different statistical method, only 59 percent of schools met the AYP requirements (Maleyko, 2011).”— The No Child Left Behind Act: Negative Implications for Low-Socioeconomic Schools
“A principal objective of each was to raise the academic achievement of disadvantaged children. Judged by this standard the programs did not show evidence of much success” (p. 138).”— How Much Can We Boost IQ and Scholastic Achievement?
“A group of academics tried to disprove the report — and couldn’t.”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
“In fact, differences in school funding do not explain students’ different outcomes. Schools and teachers explain less of the variation in student achievement than many think.”— 50 years ago, one report introduced Americans to the black-white achievement gap. Here’s what we've learned since.
“empirical support for Coleman’s conclusions has actually grown stronger over the years. ... The most convincing evidence, however, stems from the growth of “quasi-experimental” research”— The Link Between Family Background and Academic Success
“Chetty and Hendrenshow how moving to a better neighborhood as a child can influence college attendance, teenage birth rates, and income in adulthood. ... quasi-experimental estimates of the impact of a father’s absence suggest there are negative effects on children’s social and emotional well-being in addition to their educational attainment.”— The Link Between Family Background and Academic Success
“The recently released 2024 results confirm a long-term crisis in education, with student performance stagnating or declining despite decades of federal spending and education reform initiatives.”— The âNation’s Report Cardâ Is Out Hereâs What the Results Tell Us About Americaâs Schools
“Math proficiency for both grades peaked in 2013 (42% for fourth grade and 35% for eighth grade) but has declined to 39% (fourth grade) and 28% (eighth grade).”— The âNation’s Report Cardâ Is Out Hereâs What the Results Tell Us About Americaâs Schools
“on average, behaviour genetic studies of intelligence have found this same 50 per cent figure. That is, half of the reasons why people vary on intelligence test scores are genetic.”— Intelligence: All That Matters
“adoption studies, where we compare the IQs of adoptees with the IQs of their adoptive versus their biological parents, give comparable results to twin studies (Plomin et al., 1997).”— Intelligence: All That Matters
“GCTA estimates of heritability mesh with the twin and adoptee estimates (Davies et al., 2011), and it all hangs together beautifully: genetic differences lead to differences in intelligence.”— Intelligence: All That Matters
“What’s surprising to many is that, taking into account all the data from twin studies, the shared environment appears to have a very small effect on intelligence. If you measure intelligence in adulthood, almost all of the variance is explained by a combination of genes and the non-shared environment. Outside of cases of abuse or neglect, the things that parents do don’t seem to have a strong effect on their children’s intelligence, in the long run (Harris, 2009).”— Intelligence: All That Matters
“Calculus grew so popular at Garfield that classes grew beyond the 35-student limit set by the union contract. Some had more than 50 students.”— Stand and Deliver Revisited
“Just last year, local news site WBRZ aired disturbing footage of a series of fights.”— How Baton Rouge school plagued by racial tensions and violence drove military veteran to spearhead successful campaign for wealthy white residents to form new city of St George
“Between 1996 and 2015, the average gap between the mean black score and the mean white score has been .92 standard deviations. In 1996 it was .9 standard deviations and in 2015 it was .88 standard deviations.”— Race gaps in SAT scores highlight inequality and hinder upward mobility
“the district hasn't been able to close a yawning achievement gap between English-learners and native English speakers... Last spring, racial and religious tensions at Technical High School erupted.”— How one Minnesota school district handles a rising immigrant population
“New York scored below the national public average in multiple categories on the National Assessment for Educational Progress (NAEP) last year. The state ranks 46th in the nation for 4th grade math and has demonstrated “no meaningful improvement” in 4th or 8th grade reading or math for over a decade... The last time New York managed to achieve a proficiency rate above 50% in either subject was school year 2011-12.”— School’s Out and Session’s Out – What Happened this Year? - Empire Center for Public Policy
“Even today, black third-graders in predominantly white schools read better than initially similar blacks who have attended predominantly black schools. But large racial differences in reading skills persist even in desegregated schools, and a school's racial mix does not seem to have much effect on changes in reading scores after sixth grade or on math scores at any age.”— The Black-White Test Score Gap
“Overall, deliberate practice accounted for 18% of the variance in sports performance. However... deliberate practice accounted for only 1% of the variance in performance among elite-level performers. This finding is inconsistent with the claim that deliberate practice accounts for performance differences even among elite performers.”— The Relationship Between Deliberate Practice and Performance in Sports: A Meta-Analysis
Sources
Related False Assumptions
ID: FA-20260226-1570a51e · Created: 2026-02-26T23:10:37.473507 · Schema v3

Know of a source that supports or relates to this entry?

Suggest a Source