students. We randomly assign around 10,000 middle school students in Karnataka, India, to alternative peer learning treatments … statistically and economically significant for students at the bottom of the ability distribution. We develop theoretical conditions …

education, one essential aspect is that “good” peers can potentially improve students’ academic achievement, career choices, or …

at secondary schools. Students participate in a running task twice: first, the students run alone, then with a peer …

-achieving students and no significant effects among low achievers. Students in top tracking enjoyed multiple advantages, particularly a … concentration of high-performing peers and a very homogeneous classroom, that facilitated the teacher's work and increased students …' effort l evels. Bimodal classes fostered greater effort levels among top students, while teachers induced less competition …