The Effectiveness of Electronic Student Worksheets Using Problem Based Learning Models on Heat and Heat Transfer Material on the Learning Outcomes of Grade XI Students at MAN Kota Solok. jppf [Internet]. 2025 Oct. 31 [cited 2025 Nov. 8];11(2). Available from: https://jppf.ppj.unp.ac.id/index.php/jppf/article/view/19