This research aimed at carrying out the "Project of Teachers' Participation to Enhance Students' Leadership Skills at Sarakhunwittaya School," which is a research series focusing on education in the 21st Century. The study applied participatory action research methodology that places emphasis on democracy in action, in which the research team and the research participants collaborated equally in planning, operating, observing, and reflecting on the results from 2 cycles -- one cycle during each semester of the Academic Year of 2022. From the operations, changes, learning, and knowledge were expected. The research participants, which consisted of 20 teachers and 50 students, were the target group for development. The research results were collected by comparing the 3 phases, which was done before and after the operation of Cycle 1 and after the operation of Cycle 2, and the results follow. Firstly, the operation of the project led to consecutive improvements, which meant that the research participants had shown progressively higher levels of operations in enhancing the students' leadership skills during the 3 phases. Moreover, the students had demonstrated greater leadership skills after the 3 phases as well. Secondly, the research team, the participants, and Sarakhunwittaya School learned many things, especially the importance of working collaboratively, which resulted in unity and in having better achievements than when working individually. Thirdly, knowledge was a result of the operation, which became a model that showed the causes and effects between the drives, the resistances to change, the solutions to the resistances to change, and the results called a "Model of Teachers with Participation to Enhance their Students' Leadership Skills at Sarakhunwittaya School."