Thamrin, T., Saidun Hutasuhut, Aditia, R. and Putri, F. R. (2022) “The Effectiveness of the Hybrid Learning Materials with the Application of Problem Based Learning Model (Hybryd-PBL) to Improve Learning Outcomes during the COVID-19 Pandemic”, IJORER : International Journal of Recent Educational Research. Indonesia, 3(1), pp. 124-134. doi: 10.46245/ijorer.v3i1.178.