Developing of Teaching Modules with PBL-STEM Model of Photosynthesis Material to Increase Critical Thinking Skills of Grade IV Elementary School Students . J. Teach. Learn. Elem. Educ. [Internet]. 2024 Feb. 1 [cited 2025 Sep. 15];7(1):134-47. Available from: https://jtlee.ejournal.unri.ac.id/index.php/JTLEE/article/view/80