Tongyod, Ratchadaporn, and Dr.Lha Pavaputanon. 2018. “The Development of Mathematics Learning Activities Used Inquiry Cycles (5ES) Instructional Model Emphasizing Analytical Thinking on Factoring Polynomials Degree 2 for Mathayomsuksa 2”. KKU Research Journal (Graduate Studies) Humanities and Social Sciences 6 (3):38-47. https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/156325.