แซ่พู่ เ. and ใจอ่อน จ., “Effects of Polya’s Problem-Solving Approach Combined with the Bar Model Technique on Grade 4 Students’ Problem-Solving Ability in Addition and Subtraction of Whole Numbers Greater than 100,000 at Piboonsawasdee Municipal School, Phuket Province”, BMV, vol. 3, no. 1, pp. 694–708, May 2026, Accessed: Jul. 29, 2026. [Online]. Available: https://benjamit.thonburi-u.ac.th/ojs/index.php/bmv16/article/view/689