THE EFFECTIVENESS OF PROBLEM-BASED LEARNING (PBL) IN CHEMISTRY ON STUDENTS’ CRITICAL THINKING SKILLS: A LITERATURE REVIEW ON ITS IMPLEMENTATION IN INDONESIAN HIGHER EDUCATION INSTITUTIONS. INJOE [Internet]. 2026 Jul. 16 [cited 2026 Jul. 23];5(3):453-65. Available from: https://felifa.net/index.php/INJOE/article/view/857