THE EFFECT OF PROBLEM-BASED LEARNING MODEL ON THE IMPROVEMENT OF STUDENTS’ CRITICAL THINKING AND LEARNING OUTCOMES IN SOCIAL SCIENCE LEARNING SUBJECT IN CLASS 5A OF SD KRISTEN 03 EBEN HAEZER SALATIGA . JPFKIP [Internet]. 2023 Jun. 24 [cited 2025 Dec. 16];12(4):945-56. Available from: https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/301