The objectives of this research were: 1) to study the elements and indicators of Thai learning management for enhancing students' critical thinking of secondary schools under the Office of the Basic Education Commission, 2) to study current condition and desirable condition, 3) to create a Teacher Development program. The research findings were 1) the elements of Thai learning management were in the highest level, 2) the current condition was in high level and the desirable condition was in the highest level, 3) the teacher development program consisted of 1) rationale and approach, 2) objectives, 3) goals, 4) content and activities. The development was implemented by 4 steps; step 1) pre-development assessment, 2) development, 3) integration during working, 4) post-development assessment. Samples were 16 teachers’ development program. Instruments were the developed program, manual program, quality evaluation, achievement test. The results found that the utility, the feasibility and the propriety were in the highest level, 4) the effectiveness of the program found 1) the efficiency of the process was 91.56/ 84.17, 2) the effectiveness after learning was 0.6228. The knowledge increased by 62.28%, 3) comparing the average after using the program was significantly higher significantly at .05 level. When assessing teachers' satisfaction with critical thinking development programs, it was at a high level and when considered individually found that teachers were mostly satisfied with the program clearly consistent with the objectives and the development program contained the development of critical thinking in learning activities, the teachers were satisfied at the highest level.