Kongsri, Chureerat, and Somchai Vallakitkasemsakul. “The Action Research on Metacognitive Strategy Learning Activities Supplemented with Activity Packages Emphasizing on Mathematical Problem- Solving Processes on Linear Equation in One Variable Affecting Mathematical Problem-Solving Ability for the Seventh Grade Students”. Journal of Graduate School, Pitchayatat, Ubon Ratchathani Rajabhat University 19, no. 3 (December 25, 2024): 103–118. accessed April 3, 2025. https://so02.tci-thaijo.org/index.php/Pitchayatat/article/view/269494.