On Saturday, August 26, 2023, the Institute for Research and Development of the ASEAN Teacher Profession, in collaboration with the Buddharaksa Foundation, the Center for Research in Mathematics Education, and the Foundation for the Development of Thinking Skills Education, organized a seminar for educational institution administrators and a training workshop for educational supervisors under the innovation of classroom education with an open approach (Thailand Lesson Study incorporated with Open Approach: TLSOA) at Meeting Room 2301, Institute for Research and Development of the ASEAN Teacher Profession, Building 2. This event has been held for the 9th consecutive year to create a network of cooperation between school directors who use the innovation of classroom education, as well as a group of educational supervisors who are driving the use of the innovation, along with teachers who use the innovation. The objectives are to drive professional development and create networks for teachers and educational personnel, as well as to develop schools in the project into learning centers for developing the teaching profession with the innovation of classroom education with an open approach (TLSOA). At 08.45 a.m., Associate Professor Dr. Maitree Inprasit, Vice President for Education and Academic Services, gave a report. The event was honored to have Professor Dr. Montchai Duangjinda, Vice President for Research and Graduate Studies, as the chairman of the opening ceremony. Including the honor of giving a special lecture on the Educational Innovation of the Institute with Societal Contributions to school administrators, educational supervisors, and teachers who use innovations from all regions of Thailand who traveled to join the seminar at the ASEAN Teacher Professional Research and Development Institute building.