Thongwiset, P., Lertamornpong, C., & Chuntra, C. (2019). THE EFFECTS OF ORGANIZING MATHEMATICS LEARNING ACTIVITIES USING ACTIVE LEARNING ON MATHEMATICS LEARNING ACHIEVEMENT AND MATHEMATICAL CONCEPT IN INEQUALITY OF NINTH GRADE STUDENTS. Journal of Industrial Education, 18(2), 197–206. Retrieved from https://ph01.tci-thaijo.org/index.php/JIE/article/view/191682