Using a cluster randomized trial design, we evaluated the persistence of effects of a research-based model for scaling up educational interventions. The model was implemented in 42 schools in two city districts serving low-resource communities, randomly assigned to three conditions. In pre-kindergarten, the two experimental interventions were…

A randomized-trials design was used to evaluate the effectiveness of a preschool mathematics program based on a comprehensive model of research-based curricula development. Thirty-six preschool classrooms were assigned to experimental (Building Blocks), comparison (a different preschool mathematics curriculum), or control conditions. Children were…

Naturalistic observation was used to investigate the occurrence of behaviors reflecting social competence and information processing in problem solving within educational computing environments. Forty-eight first and third graders were observed working in pairs on the computer. Findings indicate that a LOGO programing environment is superior to…

The effects of the LOGO computer programing environment on creativity were studied for 73 8-year-old third graders (33 males and 40 females) who were tested before and after LOGO instruction. Overall, the LOGO group significantly outperformed a comparison group receiving non-LOGO creativity training and a nontreatment control group. (SLD)