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THE DIFFERENCE PROBLEM SOLVING SKILLS OF PHYSICS WHO ARE TAUGHT USING THE PROJECT BASED LEARNING MODEL WITH PROBLEM BASED LEARNING. JPF Unimed [Internet]. 2020 Dec. 31 [cited 2026 Mar. 23];9(2):68-72. Available from: https://jurnal.unimed.ac.id/2012/index.php/jpf/article/view/14061