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, vol. 4, no. 4, Mar. 2026, pp. 53-65, https://jippublication.com/index.php/jip/article/view/2445.