Dumrongchayakul, N. and Sumirattana, S. 2023. 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. Journal of MCU Nakhondhat. 10, 3 (Mar. 2023), 320–335.