Nantha , Cherisa, Paitoon Pimdee, and Jirarat Sitthiworachart. 2022. “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 (14):pp. 20-38. https://doi.org/10.3991/ijet.v17i14.30903.