PENERAPAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING DALAM MENINGKATKAN HASIL BELAJAR SISWA KELAS IX DI SMP NEGERI 4 TOLITOLI. jpe-unima [Internet]. 2025 Oct. 23 [cited 2026 Mar. 4];4(1s):135 144. Available from: https://ejurnal.unima.ac.id/index.php/jpe-unima/article/view/8163