Sukontorn B, Chittradub S. Guidelines of Using the Flipped Classroom in Chemistry Instruction for Upper-Secondary Students with Low Achievement. GS KKU HS [internet]. 2020 Apr. 26 [cited 2026 Sep. 15];8(1):13-25. available from: https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/241431