Musfirah, Amran M, Hakim N. Implementation the Problem Based Learning (PBL) Model Assisted by Pop-Up Book Media to Increase the Activeness of Science Learning in Class V Students of UPTD SD Negeri 85 Parepare. IJSAS [Internet]. 2026 Jul. 28 [cited 2026 Jul. 28];4(7):585-96. Available from: http://ijsasjournal.my.id/index.php/ijsas/article/view/16