Poppy Lariski, Siti Darwa Suryani and Kashardi Kashardi (2025) “The Use of Problem-Based Learning (PBL) and Inquiry Models to Develop Critical Thinking Skills and Improve Cognitive Learning Outcomes of Students at SMP Negeri 13 Lebong ”, International Journal of Educational Research, 2(3), pp. 57–62. doi: 10.62951/ijer.v2i3.480.