Nababan, S. and Gultom, E.S. 2026. Optimizing Biology Outcomes and Engagement in Human Reproduction via Jigsaw-Mediated Cognitive Load Reduction . ETDC: Indonesian Journal of Research and Educational Review . 6, 1 (Sep. 2026), 250–259. DOI:https://doi.org/10.51574/ijrer.v6i1.5449.