Marsena, Nori, Ahmad Fauzan, and Nurhizrah Gistituati. “Development of Problem-Based Mathematics Teaching Materials for Elementary School Students”. International Journal of Educational Dynamics 3, no. 2 (October 25, 2021): 41-47. Accessed November 21, 2024. http://ijeds.ppj.unp.ac.id/index.php/IJEDS/article/view/303.