Loetsongkram, Kittipit, SomJai Phukrongtung, and Pratsanee Wijankhan. 2024. “Developing the Ability to Solve Mathematical Problems of Grade 9 Students Using Problem-based Learning together with Learning Management Using KWDL techniques”. Journal of Education Yala Rajabhat University 3 (1). Yala, Thailand:22-36. https://so08.tci-thaijo.org/index.php/jeduyru/article/view/2670.