Researchers from across the country have published at least 187 empirical studies on the effectiveness of private school choice programs. The "EdChoice Study Guide" is an annually updated guide to the available research on private school choice programs in America. In this guide, one can learn what the body of rigorous research says about school choice's effect on: (1) Participant Test Scores; (2) Participant Attainment; (3) Parent Satisfaction; (4) Public School Students' Test Scores; (5) Students' Civic Values and Practices; (6) Racial and Ethnic Integration in Schools; (7) Taxpayers, State Budgets and Public School Districts (Fiscal Effects); and (8) School Safety. This year's report includes a new section synthesizing the findings of other reviews of educational choice research. [For the 2022 Edition, see ED625416.]