Kashada, Abubaker, Hongguang Li, and Chong Su. “Adoption of Flipped Classrooms in K-12 Education in Developing Countries: Challenges and Obstacles”. International Journal of Emerging Technologies in Learning (iJET) 12, no. 10 (November 2, 2017): pp. 147–157. Accessed May 3, 2024. https://online-journals.org/index.php/i-jet/article/view/7308.