This paper contributes empirically to the literature on peer effects in first-grade classrooms. The paper examines peer effects on academic achievement among first graders randomly assigned to their classrooms and to their teachers as part of Tennessee's Project STAR, America's largest ever education experiment. The analysis draws on previously…

Class size is one of the most researched and heavily debated topics in American public education. Currently, at least 25 states have initiated class size reduction (CSR) programs. In the past twenty years, several major studies have been conducted which indicate that smaller class sizes produce an increase in student achievement as well as greater…