An extensive meta-analysis, including 90 studies, was undertaken on the effects of religious private schools, charter schools, and public schools. The study explores the relationship between each of these school types and student outcomes. Additional analyses were done to determine the strengths and weaknesses of these institutions in a broad sense. The results indicate that attending private religious schools is associated with the highest level of academic achievement among the three school types, even when sophisticated controls are used to adjust for socioeconomic status. Students from public charter schools, however, performed no better than their counterparts in other public schools. Supplementary analyses indicate several ways that educators from religious and public schools can learn from one another. (Contains 6 tables.)