Bacud, Regine Kate, and Maria Chona Futalan. “The Spiral Progression Approach in Learning Mathematics: Advantages and Disadvantages”. Journal of Interdisciplinary Perspectives 2, no. 7 (May 18, 2024): 204–211. Accessed October 26, 2025. https://www.jippublication.com/index.php/jip/article/view/585.