Ravangjai, Sunisa, Russanan Kaewta, and Thongchai Khampuang. “The Development of Mathematical Problem-Solving Ability in Statistics among Grade 7 Students through Project-Based Learning Combined with the STAD Cooperative Learning Technique”. Journal of Education Rajabhat Maha Sarakham University 23, no. 2 (August 30, 2026): 266–275. accessed September 12, 2026. https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/286317.