This research aims to study current state, problems and desirable conditions for supervision, develop supervision model, and study effects of using coaching supervision model for enhancing learning management competency for teachers in primary schools under Office of the Basic Education Commission. There are 3 phases, namely, study of current state, problems and desirable conditions for supervision via coaching, including developing supervision model by studying the effects of coaching supervision model. The statistics used in data analysis were consists of mean, standard deviation and t-test. It was found that the current state and problems of supervision by coaching were at a high level and desirable conditions were presented at the highest level. The results of the development of the supervision model by coaching featured principle of the model, purposes of the model, and supervision process which consists of 7 steps as follows: Goal; Reality; Option; Way Forward; Observation which includes Pre-coaching, Coaching, and Post-coaching; Reflection Coaching; and Evaluation. Assessment of the model and success conditions, as well as the results of using the supervision model by coaching gained appropriateness, feasibility, and usefulness at the highest level.