For the past decade, MDRC has evaluated a number of interventions designed to improve the outcomes of community college students, including enhanced counseling, learning communities, and financial incentives. Encouragingly, many of these strategies have produced positive effects, affirming that changes in institutional practices and policies can…

The research article in this article is part of a larger study that examines an initiative to expand teacher expertise in facilitating mathematical problem solving within the framework of developing and field-testing pedagogical resources. We focus on one year of the study and report on the complex process of professional development as teachers…

This article reviews research on the achievement outcomes of mathematics programs for middle and high schools. Study inclusion requirements included use of a randomized or matched control group, a study duration of at least twelve weeks, and equality at pretest. There were 102 qualifying studies, 28 of which used random assignment to treatments.…