Petch-in, S., Lumduanhom, C., Piasai, K., Janjaroon, A., Hajisalah, S., & Pho-on, W. (2019). A STUDY OF MATHAYOMSUKSA I STUDENTS’ LEARNING OUTCOME ON COMBINATORICS VIA CONSTRUCTIVIST TEACHING. Journal of Industrial Education, 18(2), 101–109. Retrieved from https://ph01.tci-thaijo.org/index.php/JIE/article/view/190279