Muñoz-López, Johana, and Susana Fernández-Larragueta. “Revisiting the Competency-Based Paradigm in Primary Education: Unpacking the Spiral Curriculum Approach”. International Journal of Instruction 19, no. 1 (January 1, 2026): 419–436. Accessed January 8, 2026. https://e-iji.net/ats/index.php/pub/article/view/866.