Poppy Lariski et al. 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 (Sep. 2025), 57–62. DOI:https://doi.org/10.62951/ijer.v2i3.480.