Abao, Q. R. H. ., and G. A. . Alcantara. “Why Structured Instruction Matters: A Comparative Effect of Four Instructional Models on Mathematics Achievement in Printed Modular Distance Learning”. International Journal of Learning, Teaching and Educational Research, vol. 25, no. 3, Mar. 2026, pp. 194-17, https://ijlter.myres.net/index.php/ijlter/article/view/2747.