The purpose of this article is to investigate the relationship between school instructional
climate and students' fifth-grade mathematics and reading achievement, with a particular …

There is a need for robust evidence about which educational interventions work in preschool
to foster children's cognitive and socio-emotional learning (SEL) outcomes. Lab-based …

Multisite trials, in which individuals are randomly assigned to alternative treatment arms
within sites, offer an excellent opportunity to estimate the cross-site average effect of …

Power Analysis of Trials with Multilevel Data is a valuable reference for anyone who wants
to perform power calculations on trials with hierarchical data. It provides a thorough …

To plan group-randomized trials where treatment conditions are assigned to schools,
researchers need design parameters that provide information about between-school …

This article examines the statistical precision of cluster randomized trials (CRTs) funded by
the Institute of Education Sciences (IES). Specifically, it compares the total number of …

This paper provides the first population-based evidence on how much standardized test
scores vary among public school districts within each state and how segregation explains …

Over the past 15 years, we have seen an increase in the use of cluster randomized trials
(CRTs) to test the efficacy of educational interventions. These studies are often designed …

Multisite trials, which are being used with increasing frequency in education and evaluation
research, provide an exciting opportunity for learning about how the effects of interventions …

Programs that improve teaching effectiveness represent a core strategy to improve student
educational outcomes and close student achievement gaps. This article compiles empirical …