Background: Although males are often the initiators of teen sexual activity, pregnancy prevention programs generally target females. To address this deficiency, the Wise Guys Male Responsibility Curriculum was developed to be delivered to adolescent males in weekly classroom sessions. Methods: Seventh grade participants (n = 124) in the Wise Guys…

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.…

Direct, explicit, and systematic instruction of critical skills has been a hallmark of effective teaching for many years. In this study, we implemented a quasi-experimental pre-/post-test design with nonequivalent groups to determine the effectiveness of syllable skills instruction on reading achievement. Classes were randomly assigned to control…