KHATTAPAN, C. N. THE CASE STUDY RESEARCH OF EXAMINING THE USEFULNESS AND PERCEPTION OF THE ONLINE TEACHING PREPARATION PROGRAM: Received: 13th November 2021; Revised: 17th May 2022, 21st May 2022, 24th May 2022; Accepted: 24th May 2022. PUPIL: International Journal of Teaching, Education and Learning, [S. l.], v. 6, n. 1, p. 359–372, 2022. DOI: 10.20319/pijtel.2022.61.359372. Disponível em: Acesso em: 3 mar. 2024.