Ummi Kalsum, and Ai Mahmudatussa’adah. “Implementation of Discovery Learning on the Human Excretory System Material to Improve the Activeness and Learning Outcomes of Class VIII Students”. Co-Catalyst: Journal of Science Education Research and Theories, vol. 3, no. 1, Oct. 2025, pp. 1-10, doi:10.33830/cocatalyst.v3i1.13245.