A cluster-randomized trial (CRT) relies on random assignment of intact clusters to treatment conditions, such as classrooms or schools (Raudenbush & Bryk, 2002). One specific type of CRT, a multi-site CRT (MSCRT), is commonly employed in educational research and evaluation studies (Spybrook & Raudenbush, 2009; Spybrook, 2014; Bloom,…

Children from low-income and ethnic minority backgrounds have demonstrated substantially lower levels of math achievement than their middle class majority peers for decades. The present study addressed two research questions: (1) when used as a supplement to typical classroom instruction and in isolation from the larger curriculum, does Building…

Recent research on the design of social experiments has highlighted the effects of different design choices on research findings. Since experiments rarely collect their samples using random selection, in order to address these external validity problems and design choices, recent research has focused on two areas. The first area is on methods for…

The capacity of the field to conduct power analyses for group randomized trials (GRTs) of educational interventions has improved over the past decade (Authors, 2009). However, a power analysis depends on estimates of design parameters. Hence it is critical to build the empirical base of design parameters for GRTs across a variety of outcomes and…

The Good Behavior Game (GBG) is a classroom-based behavior management strategy aimed at reducing aggressive/disruptive behavior and socializing children into the role of student. GBG, delivered in first and second grades, has been shown to reduce rates of substance abuse and other deleterious outcomes into young adulthood (Brown, C.H. et al 2007,…

Despite decades of policy intervention to increase college entry among low-income students, considerable gaps by socioeconomic status remain. To date, policy makers have largely overlooked the summer after high school as an important time period in students' transition to college. In Summer 2012, the authors designed a randomized trial to…

This paper presents research that explores similarities and differences across six randomized controlled trials of learning communities in community colleges that were conducted by MDRC and the National Center for Postsecondary Research. Five of these studies track students' progress in the program semester and two follow-up semesters, and one…

Collaborative Strategic Reading (CSR) is a multicomponent reading intervention aimed at improving students' text comprehension. Two 1-year randomized controlled trials were conducted to determine the efficacy of CSR with seventh and eighth grade students. The Year 2 replication study was identical to the original Year 1 study except that the…

The ESEA Blueprint for Reform states that teachers need "effective, ongoing, job-embedded, professional development that is targeted to student and school needs… [and] aligned with evidence of improvements in student learning." Unfortunately, the professional development approaches advocated, though sensible and compelling in theory,…