“PENERAPAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING UNTUK MENINGKATKAN HASIL BELAJAR MATEMATIKA DAN BERFIKIR KRITIS SISWA KELAS 4 SD”. EduMa: Mathematics education learning and teaching 8, no. 1 (July 31, 2019): 33–40. Accessed May 28, 2026. https://journal1.uinssc.ac.id/index.php/eduma/article/view/4423.