Singphen, Jittawadee, and Narissara Suaklay. “The Group Investigation Technique (GI) and Gamification for Learning Activities to Enhance Scientific Explanation and Learning Achievement for Mattayomsuksa 5 Students”. Journal of Graduate MCU KhonKaen Campus 13, no. 2 (June 30, 2026): 429–442. accessed October 14, 2026. https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/282723.