Salazar , Regyn Mae, and Sherwin Uy. “Strategic Learning Intervention Package in Teaching Quadratic Equations and Inequalities for Grade 9 Mathematics Learners”. International Journal of Education, Research, and Innovation Perspectives 2, no. 4 (April 21, 2026): 829–867. Accessed April 21, 2026. https://ijerip.erio.org.ph/index.php/articles/article/view/459.