Siahaan, B. M. G., Tamba, E. M., Simbolon, M. E., Enjelika, T. N., & Simangunsong, I. (2025). The Impact of the Problem-Based Learning Model with an Open-Ended Approach on the Creative Thinking Skills of 10th Grade Students in Quadratic Function Education. AR-RUMMAN: Journal of Education and Learning Evaluation, 2(1), 149–158. https://doi.org/10.57235/arrumman.v2i1.6348