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Boonrid, P.; Sumirattana, S. A STUDY OF MATHEMATICS LEARNING ACHIEVEMENT AND GEOMETRIC THINKING ON CIRCULAR OF MATHAYOMSUKSA 3 STUDENTS LEARNING BY USING THE GEOMETER ‘S SKETCHPAD PROGRAM (GSP) WITH CONCEPT OF FLIPPED CLASSROOM ACTIVITIES. J. IND. EDUC. 2019, 18, 109-118.