Ekineh , D. R. ., and F. . Accra-Jaja. “Flipped Learning As an Innovative Teaching Model in the 21st Century”. Faculty of Natural and Applied Sciences Journal of Mathematics, and Science Education, vol. 3, no. 2, Mar. 2022, pp. 11-19, https://fnasjournals.com/index.php/FNAS-JMSE/article/view/52.