In-service teacher training aims to improve the supply of public education. A randomized experiment was conducted in Mexico to test whether teacher training could increase teacher efficiency in public secondary schools. After seven and a half months of exposure to a trained teacher, students...

The past decade has seen the emergence of numerous rigorous impact evaluations of teacher policies. This paper reviews the economic theory and empirical evidence on eight teacher policy goals: (1) setting clear expectations for teachers; (2) attracting the best into teaching; (3) preparing...