Sriarka, S. ., & Khamrat, N. . . (2021). The Effects of Learning Implimentation Based on K-W-D-L Technique on Mathematical Problem-Solving Ability and Learning Achievement of Mathayom Suksa 1 Students. Journal of Graduate Research, 12(1), 69–81. Retrieved from https://so02.tci-thaijo.org/index.php/banditvijai/article/view/247764