Husna, Fitriatul. “Improving the Ability to Understand Mathematical Concepts Through Problem-Based Learning (PBL) and Manipulatives in Class V Students of MIN 2 Pariaman City”. Journal of Development Education and Learning (JODEL) 3, no. 2 (May 31, 2025): 291–295. Accessed November 6, 2025. https://jodel.or.id/index.php/jodel/article/view/135.