For researchers seeking to improve education, a common goal is to identify teaching practices that have causal benefits in classroom settings. To test whether an instructional practice exerts a causal influence on an outcome measure, the most straightforward and compelling method is to conduct an experiment. While experimentation is common in…

This paper reviews research on the design and effectiveness of preschools in the United States. Three randomized controlled trials that enrolled roughly 350 total children in demonstration studies during the 1960s and 1970s shape much of the current discussion of preschool. We examine what these studies and more recent ones based on random…

This paper reviews the use of multiple trials, defined as multiple sites or multiple arms in a single evaluation and replications, in evaluating social programs. After defining key terms, the paper discusses the rationales for conducting multiple trials, which include increasing sample size to increase statistical power; identifying the most…

Randomized experiments have long been established as the gold standard for addressing causal questions. However, experiments are not always feasible or desired, so observational methods are also needed. When multiple observations on the same variable are available, a repeated measures design may be used to assess whether a treatment administered…

Many students lose knowledge and skills over the long summer break, and research suggests that low-income students fall further behind over the summer than their higher-income peers. Voluntary summer learning programs may provide an opportunity to stem summer learning loss and give struggling students additional learning opportunities. The Wallace…

Prior research has determined that low-income students lose more ground over the summer than their higher-income peers. Prior research has also shown that some summer learning programs can stem this loss, but we do not know whether large, district-run, voluntary programs can improve students' outcomes. To fill this gap, The Wallace Foundation…

Prior research has determined that low-income students lose more ground over the summer than their higher-income peers. Prior research has also shown that some summer learning programs can stem this loss, but we do not know whether large, district-run, voluntary programs can improve students' outcomes. To fill this gap, The Wallace Foundation…

WorkAdvance is a sectoral workforce development program designed to meet the needs of workers and employers alike. For unemployed and low-wage working adults, the program provides skills training in targeted sectors that have good-quality job openings with room for advancement within established career pathways. For employers in those sectors,…

This article examines the impacts of the Youth Transition Demonstration, an initiative of the Social Security Administration (SSA) to improve employment outcomes for youth with disabilities. Based on a random assignment design, the analysis uses data from a 1-year follow-up survey and SSA administrative records for 5,203 youth in six research…

Performance-based scholarships have two main goals: (1) to give students more money for college; and (2) to provide incentives for academic progress. MDRC launched the Performance-Based Scholarship (PBS) Demonstration in 2008 to evaluate the effectiveness of these scholarships in a diverse set of states, institutions, and low-income student…