As a result of the Every Student Succeeds Act and its requirement that students in foster care be included in education report cards, states have a renewed sense of urgency surrounding accountability for the academic achievement of this vulnerable group of students. This study examined the effects of placement and school stability on students'…

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.…