Background: Prior research shows that teachers' working conditions are important for teacher and student outcomes, such as teacher retention and student achievement. Because National Board Certified Teachers (NBCTs) can be effective in the classroom and as instructional leaders, they are well positioned to create favorable working conditions for…

The purpose of this paper is to showcase new research that seeks to provide guidance on the heterogeneity of treatment effects by utilizing the variance of demographic differences in state assessments. This study is focused on a simple randomized block design where students are nested within schools, and within each school students are randomized…

Randomized experiments are often considered the strongest designs to study the impact of educational interventions. Perhaps the most prevalent class of designs used in large scale education experiments is the cluster randomized design in which entire schools are assigned to treatments. In cluster randomized trials (CRTs) that assign schools to…

Background: Cluster-randomized experiments that assign intact groups such as schools or school districts to treatment conditions are increasingly common in educational research. Such experiments are inherently multilevel designs whose sensitivity (statistical power and precision of estimates) depends on the variance decomposition across levels.…

This teacher's guide on the 50 state quarters produced by the United States Mint includes six lesson plans that fit easily into the social studies curriculum for grades 4-6. The lesson plans include reproducible student work pages that coincide with each lesson; state facts and information about the 2001 state quarter designs (New York, North…