PENERAPAN MODEL PROBLEM BASED LEARNING (PBL) BERBANTUAN MEDIA FLIP CHART UNTUK  MENINGKATKAN HASIL BELAJAR SISWA SEKOLAH DASAR. j.tunas.pendidik [Internet]. 2026 Oct. 13 [cited 2026 Oct. 27];9(1):229-35. Available from: https://ejournal.ummuba.ac.id/index.php/pgsd/article/view/4150