Duangsong, P., Pansuppawat, T., & Khamhaengpol, A. (2022). Development of Critical Thinking Abilities and Learning Achievement of Mathayomsuksa 1 Students Entitled Substances Around Us by Using Problem-Based Learning and Graphic Organizers. Journal of Education Rajabhat Maha Sarakham University, 19(2), 165–177. Retrieved from https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/258624