PENGARUH PROBLEM BASED LEARNING TERHADAP HASIL BELAJAR IPA SISWA KELAS 3 SEKOLAH DASAR. j.tunas.pendidik [Internet]. 2026 Mar. 12 [cited 2026 Mar. 12];8(2):440-7. Available from: https://ejournal.ummuba.ac.id/index.php/pgsd/article/view/3325