Computer-based instruction in kindergarten classrooms can be controversial, but one Los Angeles charter school is showing promising results and plans to expand the hybrid approach. The school conducted an experiment with a teaching method called blended learning, in which students learn from computers as well as teachers. The kindergarten…

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.…

Map-guided wayfinding requires updating the map-space relation whenever we turn. In 3 studies, children used a map to follow a path with two 90 degree turns. Although carrying the map, children rarely physically adjusted the map after turns. They performed well when the map was aligned with the space (on the 1st and 3rd legs), and they performed…