Silitonga, R. G., Sauduran, G. N., & Panjaitan, S. M. (2025). THE PROBLEM BASED LEARNING (PBL) LEARNING MODEL ON STUDENTS’ LEARNING INTEREST IN QUADRATIC FUNCTION MATERIAL FOR CLASS X . Dharmas Education Journal (DE_Journal), 4(1). https://doi.org/10.56667/de_journal.v4i1.1579