The public narrative surrounding efforts to improve low-performing K-12 schools in the United States has been notably gloomy. But what is known empirically about whether school improvement works, which policies are most effective, which contexts respond best to intervention, and how long it takes? We meta-analyze 141 estimates from 67 studies of…

The public narrative surrounding efforts to improve low-performing K-12 schools in the U.S. has been notably gloomy. Observers argue that either nothing works or we don't know what works. At the same time, the federal government is asking localities to implement evidence-based interventions. But what is known empirically about whether school…

The focus of the study, a replicative meta-analysis, was to provide educators and policymakers with an analysis of extant data collected from current research, 1996 to pre-"Race to the Top" (RttP) and "American Recovery and Reinvestment Act" of 2009 (ARRA), concerning the question of whether or not a positive or negative effect…