ทองวิเศษพ., เลิศอมรพงษ์ช., & จันทราช. (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://www.tci-thaijo.org/index.php/JIE/article/view/191682