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…

Since the passage of "No Child Left Behind" (NCLB) in 2001, public schools in the United States have witnessed an influx of reforms intended to elevate students' academic standing in a global economy. The unprecedented federal involvement in education resulting from the passage of NCLB has propelled a nationwide movement to standardize…

This study evaluated the quality of the research and evidence base for using response cards to increase opportunities to respond (OTR) for students with and without disabilities at the elementary level (i.e., kindergarten through Grade 5). Using quality indicator criteria for single-case research, six single-case studies investigating response…

Research evidence suggests that summer breaks contribute to income-based achievement and opportunity gaps for children and youth. However, summertime can also be used to provide programs that support an array of goals for children and youth, including improved academic achievement, physical health, mental health, social and emotional well-being,…

Iowa established the Statewide Voluntary Preschool Program (SVPP) in 2007. It has grown to be the largest--although not the only--public preschool program in the state. It is available without regard to family income. Iowa also supports preschool for low-income children through its Shared Visions program and Early Childhood Iowa, the…

This booklet is one in a series of "hot topics" reports produced twice a year by the Northwest Regional Educational Laboratory. These reports briefly address current educational concerns and issues as indicated by requests for information that come to the Laboratory from the Northwest region and beyond. Each booklet contains a discussion…

The No Child Left Behind Act of 2001 ("NCLB") presents a rigorous plan for education reform, challenging the nation's schools to increase student achievement and teacher quality. Central to that call for accountability is the requirement that schools take greater care in the selection of curricular and professional development programs…

Although experimental results indicate that smaller classes promote higher achievement in early elementary school, the broader literature on class-size effects is inconclusive. This seeming contradiction raises questions about the generalizability of experimental evidence, an issue that this article addresses by examining the effects of class size…