Nurhayati Sholihah I. EFEKTIVITAS MODEL PROBLEM BASED INSTRUCTION TERHADAP HASIL BELAJAR IPA SISWA KELAS IV SDN BOJONGRENGED 1. Elementary J. Inov. Pendidik. Dasar [Internet]. 2025 Oct. 3 [cited 2026 Apr. 26];5(3):669-81. Available from: https://www.jurnalp4i.com/index.php/elementary/article/view/6890