This study aims to study the self-development of primary school teachers in classroom management through an active learning program. Three schools and 7 teachers participated in the program based on professional development in 10 face-to-face workshops, 20 meet peers or experts, classroom observation, monitoring, and professional learning community, and 70 manage instructional practices based on active learning. An action research was employed for investigating how teachers have self-development through the active teacher program. It was found that teachers had scored 83.86% on understanding active learning management. They had a high level of active learning management and a high level of satisfaction with the active learning management program. The active learning program leads teachers to have fun in their classrooms. They could develop their knowledge and learning management skills as well as self-development by actively instructing.