“…The students who were in the target group gained higher posttest scores than the pretest with statistical significance. It can be seen that the findings are consistent with other studies that applied R&D methodology, with a similar research design, namely, "Developing Teachers to Enhance Students' Effective Teamwork Skills" by Saysin and Dhammapissamai (2023), "Empowering Teachers' Learning to Develop Students' Inspirational Skills" by Kromthamma and Supakicco (2023), "Empowering Teachers' Learning to Develop Innovative Skills for Students" by Hatsanmuang and Sanrattana (2023), "Developing Teachers to Enhance Project Management Skills for Students" by Nukoonkan and Dhammapissamai (2023), "Empowering Teachers' Learning to Enhance Students' Change Leadership Skills" by Praneetpolkrung and Supakicco (2023), and "Enhancing Teachers' Learning to Develop Students to Become Successful Students" by Thammabut and Thacha (2023). Therefore, this indicates that the concepts of "Knowledge and Action is Power" and "Development for Teachers' Learning to Student Development" used in this research methodology, including the online self-training program that consists of two projects carried out consecutively: 1) Teacher Development Project using 7 self -training modules for teacher learning about teamwork skills, and 2) Project of Applying Learning Outcomes to Student Development using 1 self-training module to be used as a guideline for teachers' practice, has resulted in effective educational innovation as expected.…”