Surya Octavianus Simbolon, Haryono H, Decky Avrilianda, Rafika Bayu Kusumandari. THE EFFECTIVENESS OF PROBLEM BASED LEARNING MODEL IN IMPROVING STUDENTS’ CRITICAL THINKING SKILLS AND LEARNING OUTCOMES. IJSET [Internet]. 2026 May 22 [cited 2026 May 22];5(6):3420-5. Available from: https://ijset.org/index.php/ijset/article/view/1924