Gifted and talented individuals (GT) are those who exhibit high levels of competency or potentiality in one or more domains. Academically gifted students make up roughly six to ten percent of the current total student body population in the United States and can be dated back as far as William Torrey Harris's efforts in 1868. The current state…

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.…