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.…

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.…

Community college stakeholders are searching with increasing urgency for approaches with the potential to improve the success rates for community college students, particularly those in need of developmental education. "Learning communities," which place cohorts of students together in two or more courses for one semester, are a popular…

THIS STUDY WAS DESIGNED TO DETERMINE WHETHER SIGNIFICANT DIFFERENCES OCCUR IN MASTERY OF A COLLEGE COURSE LECTURE-DISCUSSION TYPE FOR FRESHMEN AND SOPHOMORES WHEN STUDENTS USE PROGRAMED MATERIALS OF INSTRUCTION RATHER THAN STANDARD TEXTBOOKS. FOUR STANDARD AND FOUR PROGRAMED SECTIONS WERE USED FOR COMPARATIVE PURPOSES. STUDENTS SELECTED THESE…