MUNAWAROH S. UPAYA PENINGKATAN AKTIVITAS DAN HASIL BELAJAR PESERTA DIDIK DI SMPN 3 BANGUNTAPAN MELALUI MODEL PEMBELAJARAN PROBLEM BASED LEARNING. J.t [Internet]. 2021Jun.18 [cited 2026Feb.24];1(1):89-100. Available from: https://jurnalp4i.com/index.php/teaching/article/view/87