2019. THE EFFECTIVENESS OF BLENDED PROBLEM-BASED LEARNING FOR ENHANCING COGNITIVE AND LEARNING OUTCOMES OF STUDENTS‘ CRITICAL THINKING SKILLS ON REDOX MATERIALS. Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam. 24, 1 (Apr. 2019), 28–34. DOI:https://doi.org/10.18269/jpmipa.v24i1.17332.