Sichiangha A, Soijit P, Chansaengkrachang K. DEVELOPMENT OF LEARNING ACTIVITIES FOR MATHEMATICAL PROBLEM-SOLVING THROUGH GEOGEBRA PROGRAM WITH PLOBLEM-BASED LEARNING ACTIVITIES. JMND [Internet]. 2021 Jul. 31 [cited 2024 Apr. 25];8(8):31-42. Available from: https://so03.tci-thaijo.org/index.php/JMND/article/view/254263