Examined developmental trajectories toward violence over middle childhood and children's response to a universal school-based preventive intervention. Found that three growth patterns--positive linear, late acceleration, and gradual deceleration--characterized the children's trajectories, and these trajectories varied meaningfully by child…

Natural experiments explored the effects of attending public Philadelphia K-to-8 schools or public middle schools on eighth- and ninth-grade achievement. Found that students attending K-8 schools had higher reading, mathematics, and science achievement than students attending middle schools serving similar communities. Suggested that number of…

The present study involved the evaluation of the effectiveness of four types of preschool programs on the educational development of lower and middle class children. Middle class children were exposed to "unit" and "cognitive" based preschool programs; lower class children were exposed to "day care" and Montessori…

Oklahoma is one of three states to offer a free prekindergarten (pre-K) program to all students in participating school districts on a voluntary basis. Fortuitous circumstances in Tulsa, Oklahoma, the state's largest school district, permitted an unusually rigorous evaluation of the pre-K program in Tulsa. Because 4-year-olds beginning pre-K and…

This report summarizes evaluation information on reading, writing, and mathematics achievement among elementary and secondary school students in 310 school districts in Massachusetts, after the second year of implementation of the Basic Skills Improvement Policy. The report describes data collection, analysis, and reporting procedures, summarizes…