“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”. Indonesian Journal of Education (INJOE), vol. 5, no. 3, July 2026, pp. 453-65, https://doi.org/10.5281/zenodo.21404677.