Sukontorn, B. ., & Chittradub, S. . (2020). Guidelines of Using the Flipped Classroom in Chemistry Instruction for Upper-Secondary Students with Low Achievement. KKU Research Journal (Graduate Studies) Humanities and Social Sciences, 8(1), 13–25. Retrieved from https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/241431