This study inquired into the effect of single-sex schooling on achievement of female adolescents. It used national examination data of 4,787 Polish female students (10 cohorts) attending single-sex and co-educational Catholic schools. We tested two sets of partially contradictory predictions derived from two different theoretical models explaining…

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…

This report has a simple aim: to present results from international assessments so readers can judge for themselves how American students stack up globally. It's intended to be a stand-alone supplement to the "Education Olympics" web event held between August 8th and August 22nd, 2008 (see edolympics.net). It shows how the U.S. has…