TY - RPRT AU - Bellue, Suzanne AU - Bouguen, Adrien AU - Gurgand, Marc AU - Munier, Valerie AU - Tricot, André TI - When Effective Teacher Training Falls Short in the Classroom: Evidence from an Experiment in Primary Schools PY - 2023/Aug/ PB - Institute of Labor Economics (IZA) CY - Bonn T2 - IZA Discussion Paper IS - 16398 UR - https://www.iza.org/publications/dp16398 AB - While in-service teacher training programs are designed to enhance the performance of several cohorts of students, there is little evidence on the persistence of their effects. We present the two-year results of a large-scale, randomized study of an intensive in-service teacher training program in France: during and after implementation. Our estimates highlight the short-run effectiveness of the training program; it successfully improves students' outcomes but only during the implementation year. A detailed analysis of teachers' outcomes indicates that teachers changed their pedagogical vision and practices but struggled to apply acquired skills to contents not directly covered in the training. KW - professional development KW - in-service teacher training KW - teacher effect ER -