The effectiveness of an experimental mathematics teaching program was investigated. Observational measures revealed that teachers implemented the treatment. Analyses of product data showed that students of treatment teachers outperformed those of controls. Thus, teachers and/or teaching methods exerted a significant difference on student progress…

A study of one grade cohort of students taught in a Chicago Mastery Learning Reading (CMLR) Program was extended to two additional cohorts, one older and one younger than the original group but who were taught using the same method. The students' reading comprehension test scores were compared with those of students in other schools, not taught by…