Issaranusorn, Naratip, Patiphat Nasok, Wilasinee Srirak, Sopon Mesub, Rakchanok Mangsachart, and Supaporn Saduakdee. “The Development of Mathematics Learning Achievement in Data Presentation and Interpretation using Graphs through the Teams–Games–Tournament (TGT) Instructional Model Integrated with Polya’s Problem-Solving Process for Grade 7 Students”. Education journal Faculty of Education, Nakhon Sawan Rajabhat University 9, no. 2 (June 30, 2026): 131–144. accessed September 10, 2026. https://so02.tci-thaijo.org/index.php/edunsrujo/article/view/285861.