The Effect of The Problem-Based Learning Model on Critical Thinking Skills in Mathematical Problem Solving. Inovasi, [S. l.], v. 23, n. 2, 2026. DOI: 10.33626/5247wm15. Disponível em: https://jurnal.sumutprov.go.id/index.php/inovasi/article/view/1080. Acesso em: 28 oct. 2026.