Corpuz, Josua, and Sheryl Irene Manaligod. “Development and Validation of Learning Intervention Material in Adding and Subtracting Integers Using Modified ADDIE Model”. Journal of Interdisciplinary Perspectives 4, no. 4 (March 5, 2026): 53–65. Accessed March 6, 2026. https://jippublication.com/index.php/jip/article/view/2445.