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Dumrongchayakul N, Sumirattana S. A STUDY OF MATHEMATICS LEARNING ACHIEVEMENT AND DISCIPLINE THROUGH THE FLIPPED CLASSROOM UNDER THE CONCEPT ACTIVE LEARNING APPROACH OF MATTHAYOMSUKSA THREE STUDENTS BANGKOK CHRISTIAN COLLEGE. JMND [internet]. 2023 Mar. 31 [cited 2025 Dec. 6];10(3):320-35. available from: https://so03.tci-thaijo.org/index.php/JMND/article/view/268628