Noppan, Orrasa, Kannaphat Hunsuwan, and Nantawat Pattaragoranan. 2025. “Development of Academic Achievement in the Thai Language Learning Subject: Diphthongs, Using the Cooperative Learning Process with the STAD Technique for Grade 6 Students at Bangkokthonburi Demonstration School”. Journal of Buddhist Education and Research (JBER) 11 (3):190-200. https://so06.tci-thaijo.org/index.php/jber/article/view/283831.