“THE EFFECTIVENESS OF THE HEAT AND ITS TRANSFER E-MODULE BASED ON PROBLEM-BASED LEARNING TO IMPROVE STUDENTS’ PROBLEM-SOLVING SKILLS”. SPEKTRA: Jurnal Kajian Pendidikan Sains 11, no. 2 (December 1, 2025): 270–281. Accessed May 28, 2026. https://ojs.unsiq.ac.id/index.php/spektra/article/view/9882.