Phasunin, Nonthawat, and Jitraporn Wongkamjan. “Developing Problem Solving Ability By Using Problem-Based Learning Approach With Higher Order Questions Of Grade 5 Students”. Journal for Developing the Social and Community 10, no. 1 (April 26, 2023): 469–484. accessed September 2, 2026. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/260553.