Prasetiawan, Fajar, Muhammad Sofwan, and Bunga Ayu Wulandari. “The Effect of Problem-Based Learning Model on Learning Motivation and Problem-Solving Skills of Fourth Grade Elementary School Students”. Journal of Innovation and Research in Primary Education 4, no. 3 (July 1, 2025): 543–556. Accessed January 21, 2026. https://ejournal.papanda.org/index.php/jirpe/article/view/1403.