N. Jongjit, A. Sangarwut, and T. Kadroon, “The Development of Mathematical Problems Solving on Two Variable Linear Equations System using Learning Activities of Polya’s Model Combined with Think-Pair-Share Technique for Matthayomsuksa 3 Chaiya Wittaya School Suratthani”, jg-mcukk, vol. 12, no. 3, pp. 441–454, Sep. 2025.