Oktaviantina, R. (2024) “Efforts to Improve Student Learning Outcomes Using the Problem Based Learning Model in High School Students”, KOGNITIF: Jurnal Ilmiah Pendidikan dan Keguruan, 1(2), pp. 26–33. Available at: https://journal.mgedukasia.or.id/index.php/kognitif/article/view/226 (Accessed: 27 June 2025).