New nationwide data collected by the U.S. Department of Education's civil rights office reveal stark racial and ethnic disparities in student retentions, with black and Hispanic students far more likely than white students to repeat a grade, especially in elementary and middle school. The contrast is especially strong for African-Americans. In the…

This report uses administrative data provided by the Los Angeles Unified School District (LAUSD) on kindergarten to third-grade students. The records begin with kindergartners in 2001, first-graders in 2002, second-graders in 2003, and third-graders in 2004 and include all LAUSD students in grades K-3 for 2004 to 2008. Altogether, the raw data…

We present evidence that the positive relationship between kindergarten entrance age and school achievement primarily reflects skill accumulation prior to kindergarten, rather than a heightened ability to learn in school among older children. The association between achievement test scores and entrance age appears during the first months of…