Summarizes conclusions from a review on the effects of programs intended to prevent early school failure. Examines the effects of birth-to-three programs, preschool, kindergarten, grade retention, class size and instructional aides, nongraded primary programs, one-to-one tutoring, and others. Research on prevention and early intervention indicates…

This report summarizes research on the impacts of alternative early intervention programs to prevent school failure. Also considered are the magnitude of estimates of program effects and policy implications of using the programs. The nine principal types of early schooling programs reviewed are those involving: (1) substantial reductions in class…