Principals (policy makers) have debated the progress in U.S. student performance for a half century or more. Informing these conversations, survey agents have administered seven million psychometrically linked tests in math and reading in 160 waves to national probability samples of selected cohorts born between 1954 and 2007. This study is the…

"The United States' failure to educate its students leaves them unprepared to compete and threatens the country's ability to thrive in a global economy." Such was the dire warning recently issued by a task force sponsored by the Council on Foreign Relations. Chaired by former New York City schools chancellor Joel I. Klein and former U.S.…