Kompetensi Kepalasekolah Sebagai Supervisor Dalam Pembinaan Profesionalisme Guru Di SMA Negeri 1 Peukan Bada Kabupaten Aceh Besar

: To improve the professionalism of teachers, implementation of teaching supervision by the principal is indispensable as an indicator of the success of learning implementation in school and teachers' tasks. A principal absolutely must have a competence as a supervisor because through supervision activities problems faced by teachers in the implementation of learning and development of professionalism can be identified, so that a solution can be found through routine coaching by the principal. The purpose of this study was to determine the teaching supervision program in an effort to improve the performance and professionalism of teachers at SMAN 1 Peukan Bada Senior High School in Aceh Besar Regency. This study used a qualitative approach. Data collection techniques used were: observation, interview and documentation study. The subjects of the study were principal and teachers of SMAN 1 Peukan Bada. The results of the study showed that: (1) The principal has the ability as a supervisor in the implementation of teacher professional development program in SMAN 1 Peukan Bada, (2) The principal used individual supervision technique as the strategy to improve the professionalism of teachers through classroom visit activity, classroom observation, peer supervision, informal supervision and group technique, (3) The supervision carried by the principal provided a positive impact in improving the professionalism of teachers, with the growing understanding of the teachers on how to become good educators, (4) The obstacle in the implementation of program supervision was the limited time, resulting in uneven supervision activities for any teacher, so that the efforts to improve teachers' competence was not optimal