Petch-in, Sarawut, Chira Lumduanhom, Khawn Piasai, Anek Janjaroon, Sukanya Hajisalah, and Witsarut Pho-on. 2019. “A STUDY OF MATHAYOMSUKSA I STUDENTS’ LEARNING OUTCOME ON COMBINATORICS VIA CONSTRUCTIVIST TEACHING”. Journal of Industrial Education 18 (2):101-9. https://ph01.tci-thaijo.org/index.php/JIE/article/view/190279.