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 paper presents a series of illustrative LEGO Mindstorms-based science and math activities, developed under an NSF GK-12 Fellows project, for elementary, middle, and high school grades. The activities, developed by engineering and science graduate Fellows in partnership with K-12 teachers, are grade appropriate, address pertinent learning…

Spelling is the study of word-specific knowledge, and knowledge about words is important. Today, many fourth through eighth graders can't write with fluency because they don't have automatic access to basic words and spelling patterns. Yet, sadly, many teachers have had little support in this area. Luckily, evidence-based spelling instruction is…