The achievement gap in the United States is the observed, persistent disparity in measures of educational performance among subgroups of U.S. students, especially groups defined by socioeconomic status (SES), race/ethnicity and gender. The achievement gap can be observed on a variety of measures, including standardized test scores, grade point average, dropout rates, and college enrollment and completion rates. While this article focuses on the achievement gap in the United States, the gap in achievement between lower income students and higher income students exists in all nations and it has been studied extensively in the U.S. and other countries, including the U.K. Various other gaps between groups exist around the globe as well.
Research into the causes of the disparity in academic achievement between students from different socioeconomoic and racial backgrounds has been ongoing since the 1966 publication of the Coleman Report (officially titled "Equality of Educational Opportunity"), commissioned by the U.S. Department of Education, which found that a combination of home, community, and in-school factors affect academic performance and contribute to the achievement gap. According to American educational psychologist David Berliner, home and community environments have a stronger impact on school achievement than in-school factors, in part, because students spend more time outside of school than in school. In addition, the out-of-school factors influencing academic performance differ significantly between children living in poverty and children from middle-income households.
The achievement gap, as reported in trend data collected by the National Assessment of Educational Progress (NAEP), has become a focal point of education reform efforts by a number of nonprofit organizations and advocacy groups. Attempts to minimize the achievement gap by improving equality of access to educational opportunities have been numerous but fragmented, such as affirmative action, multicultural education, finance equalization, and interventions to improve school testing, teacher quality and accountability.