THE APPLICATION OF PROBLEM BASED LEARNING (PBL) MODEL TO IMPROVE STUDENTS’ LEARNING OUTCOMES ON SOCIAL STUDIES SUBJECTS IN GRADE IV OF ELEMENTARY SCHOOL II TANJUNGSARI. JRPP [Internet]. 2024 Sep. 6 [cited 2026 Mar. 5];3(2):129-46. Available from: https://transpublika.co.id/ojs/index.php/JRPP/article/view/765