Khongpinit, Ratthapong, Maliwan Phattarachaleeku, and Monchaya Chiangpradit. “Development of Mathematics Learning Activities Base on Polya’s Method with Geogebra Program to Enhance Mathematical Problem Solving on Rectangles for Prathomsuksa 4 Students”. Journal of Education Rajabhat Maha Sarakham University 19, no. 3 (December 27, 2022): 215–226. accessed September 29, 2026. https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/261149.