HANDAYANINGTYAS T. UPAYA MENINGKATKAN KEAKTIFAN SISWA MELALUI MODEL PROBLEM BASED LEARNING PADA MATA PELAJARAN IPA DI SEKOLAH DASAR. Educational [Internet]. 2023Apr.13 [cited 2026Feb.13];3(1):118-24. Available from: https://jurnalp4i.com/index.php/educational/article/view/2115