Understanding disparities in school readiness among America's children when they begin kindergarten is critically important, now more than ever. In today's 21st century global economy, it is expected that the great majority of children will complete high school ready to enter college or begin a career, and assume their civic responsibilities. This…

Closing achievement gaps--disparities in academic achievement between minority and white students, and between low-income and higher-income students--has long been an unrealized goal of U.S. education policy. It has now been 60 years since the Supreme Court declared "separate but equal" schools unconstitutional in "Brown v. Board of…