PENERAPAN PEMBELAJARAN TEMATIK DI MASA PANDEMI COVID19 MELALUI MODEL PROBLEM BASED LEARNING DALAM MENINGKATKAN HASIL BELAJAR PESERTA DIDIK KELAS IV SD. JS [Internet]. 2021 Jun. 20 [cited 2026 Mar. 24];5(3):87-99. Available from: https://jurnal.unimed.ac.id/2012/index.php/js/article/view/26474