The development of outcome-based education (OBE)-oriented teaching materials through problem-based and project-based learning for the elementary science education course . JPFKIP [Internet]. 2025 Dec. 1 [cited 2025 Dec. 13];14(6):835-51. Available from: https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/86