The purpose of this research was to examine the internal validation and the external validation of an Integrating teacher competency and participatorysupervision model. The target group for the internal validation consisted of 6 experts, 1 Instructional Designer, 2 Developers of constructivist web-based learning environment, and 2 supervisors. The target group for the external validation consists of 30 teachers The Office of Kalasin Educational Service Area 1, Kalasin Province ,Northeastern Thailand.The Research Developmental Phase II: Model validation was employed in this study. The Results revealed that: The results from the Model Validation, (1) Internal validation: The model have been examined by 6 experts and found that the model design are consistent with underlined theories which based on Instruction Design theories (ID Theories) (2) The external validation found that the learning with model, teachers have high levels of teacher competencies( = 4.26,S.D = 0.85), the teacher's opinions toward the integrating teacher competency and participatory supervision model are appropriated in all aspe cts and the model can enhance teacher competencies.