This research was a Participatory Action Research (PAR) methodology to implement the project “The Collaborative Power of Teachers to Strengthen Student's Global Leadership Skills in Na-ngiw Wittayasan School”, which is part of the Doctoral Program in Educational Administration's research program on 21st-century education, Mahamakut Buddhist University, Isan Campus with the concept of "Cooperative Action for Better Change". From the Planning, Acting, Observing, and Reflecting (PAOR) 2 cycles. Cycle one for each semester in the academic year 2022, with 25 teachers as research participants and 640 students in the development target group and the objectives were: 1) To change the level of practice of the research participants and The Global Leadership Skills of students to improve. From the comparison of 3 phases: before and after the practice in the 1st cycle and after the 2nd cycle practice. 2) To create learning from practice and 3) to gain knowledge from practice. The results of the research revealed that 1) there was a change for improvement, respectively, for the teachers who were research participants, the average scores from the performance assessment results were higher, respectively, from 2.92 to 3.06 and 4.00. As for the students who are the target group for development, the Global Leadership Skills assessment was also at a higher level, respectively, from 2.47 to 3.17 and 3.59. 2) The research team, the research participants, and Na-ngiw Wittayasan School gained much proficiency. 3) Generate knowledge from practice that demonstrates the cause-and-effect relationship of the applied driving force that results in a change. Including, resistance to change and how to overcome resistance to change which in this research is called “Na-ngiw Wittayasan School Model: The Collaborative Power of Teachers to Strengthen Student’s Global Leadership Skills”