According to the Office for National Education Standards and Quality Assessment (Public Organization) has developed a framework for external quality assurance. Dr. Suthiporn Sajjapanroj, lecturer, Institute for Innovative Learning, Mahidol University, was invited to be a lecturer of a workshop on “Being an External Assessor” for 12 basic education institutes under the pilot research project to develop an external quality assurance system of the basic education level, fiscal Year 2023. The workshop was held on August 5-7, 2023 at the Santhawamitree Conference Room, Phayathai Plaza Building, Ratchathewi, Bangkok.