The main focus of this study was to investigate if, or to what extent, there is a significant relationship between high school science course sequencing and proficiency on 11th grade Florida Comprehensive Assessment Test (FCAT) Science. The Florida Legislature mandated a specific number of sciences as a requirement for graduation. High schools…

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.…