Haifaturrahmah, Haifaturrahmah, Erniwati Erniwati, and Hidayati Hidayati. “Problem-Based Learning Models (PBL) in Mathematics Learning: Improve Young Learner Students Learning Outcomes”. Proceeding International Conference on Lesson Study 1, no. 1 (December 1, 2023): 260–265. Accessed June 14, 2026. https://journal.umg.ac.id/index.php/icls/article/view/6839.