This report, the second from a large-scale study for the U.S. Department of Education’s Institute of Education Sciences of four early math programs, shows that the curriculum used by the study schools mattered. The study examined (1) Investigations in Number, Data, and Space (Investigations),...

This report describes the research and policy context for the evaluation, logic model underlying the projects, and selection of the random assignment sites and enrollment of youth. It also presents comprehensive designs for the process, cost, impact, and benefit-cost analyses, and concludes with...

Describes the projects and the policy background for the initiative.