This paper described the development process and evaluations of a learning module, School-based Supervision of Students (ED8013307), of master's degree students in Educational Administration during the academic year 2019 at Northeastern University, Khon Kaen, Thailand. The results of the learning module found the efficiency of the learning module was higher than the specified criterion of 80/80, both in the action process (84.76) and in the efficiency of knowledge (82.16). The developed module had its quality, propriety, congruence, feasibility and utility at the highest level. The effectiveness index in students' learning management was 0.7578 indicated the increasing knowledge of the students at 75.78% as their learning achievement-test was significantly higher than the pre-test at 0.05. Beside these, there were no significant differences between pre-test and post-test learning achievement after 2 weeks indicating that they have had their learning retention. The students expressed overall satisfaction with the learning module at the highest level.