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.…

The focus of this study was twofold: one, to determine if students could increase their physics content knowledge through the completion of an online hands-on Microcomputer-Based Laboratory (MBL) unit on motion; and two to determine if the demonstrated learning gains were equivalent to those of students who completed the same MBL activities in a…