Current quantitative research on the effectiveness of the National Board certification has resulted in contradictory findings. Consequently, this meta-analysis synthesized the results of 12 studies on National Board Certification and student achievement. Of those, 9 studies were used to calculate effect sizes for reading, and all 12 were used to…

The present meta-analysis examines the effect of grade retention on academic outcomes and investigates systemic sources of variability in effect sizes. Using multilevel modeling (MLM), the authors investigate characteristics of 207 effect sizes across 22 studies published between 1990 and 2007 at two levels: the study (between) and individual…

To respond to Congress' interest in student outcomes at different types of schools, this report addresses the following questions: (1) What does research show about graduation rates, employment outcomes, student loan debts, and default rates for students at for-profit schools compared to those at nonprofit and public schools, taking differences in…

Best-evidence synthesis was used to review 29 research papers published in English that evaluate the effects of ability grouping on student achievement in secondary schools. Six randomized experiments, 9 matched experiments, and 14 correlational studies were reviewed. Findings do not indicate beneficial effects of ability grouping on achievement.…