Research has shown that teacher effectiveness is the most important school-based factor that influences student outcomes, including student achievement. Studies have also shown that there is substantial variation in teacher effectiveness, such that some teachers improve student outcomes at a much faster rate than others. The strong influence of…

As evidence becomes increasingly important in educational policy, it is essential to understand how research design might contribute to reported effect sizes in experiments evaluating educational programs. A total of 645 studies from 12 recent reviews of evaluations of preschool, reading, mathematics, and science programs were studied. Effect…

"Teach For America" ("TFA") is a highly selective route to teacher certification that aims to place non-traditionally trained teachers in high-need public schools. The What Works Clearinghouse (WWC) identified seven studies of teachers trained through "TFA" that both fall within the scope of the Teacher Training,…