Sagge, Roberto Jr., and Lemar P. Delos Reyes. “Development of Flexible Learning Instruction Through Progressive, Personalized, Engaging and Diversified (FLIPPED) Video Media in Mathematics”. International Journal of Multidisciplinary: Applied Business and Education Research, vol. 5, no. 12, Dec. 2024, pp. 5318-27, https://doi.org/10.11594/ijmaber.05.12.27.