Nantha , Cherisa, Paitoon Pimdee, and Jirarat Sitthiworachart. “A Quasi-Experimental Evaluation of Classes Using Traditional Methods, Problem-Based Learning, and Flipped Learning to Enhance Thai Student-Teacher Problem-Solving Skills and Academic Achievement”. International Journal of Emerging Technologies in Learning (iJET) 17, no. 14 (July 26, 2022): pp. 20–38. Accessed April 25, 2024. https://online-journals.org/index.php/i-jet/article/view/30903.