The Community Service activity with the theme "Training and Assistance in Preparing Classroom Action Research Proposals to Increase Teacher Professionalism at SMA N 2 Banguntapan" was held on Friday, June 16, 2023 with 30 participants. Service activities in the form of training and mentoring with Prof. Dr. Paidi, M.Si who guides teachers with science and technology. The second resource person is Prof. Dr. Endang Mulyani, M.Si who guides teachers with social and humanities groups. In general, the training activities have been going well, as seen from the enthusiasm and positive response from the participants. With this training activity, it is able to increase teachers' understanding of PTK so that they are able to improve the learning process through an in-depth study of what is happening in their class and are able to increase teacher professionalism.