CONSTRUCTIVISM THROUGH PROJECT-BASED LEARNING MODEL ON NATURAL SCIENCE LEARNING SUBJECTS IN ELEMENTARY SCHOOLS (LITERATURE REVIEW) . JPFKIP [Internet]. 2023 Aug. 25 [cited 2025 Dec. 18];12(4):1055-72. Available from: https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/324