PRASETIAWAN, F.; SOFWAN, M.; WULANDARI, B. A. 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, [S. l.], v. 4, n. 3, p. 543–556, 2025. DOI: 10.56916/jirpe.v4i3.1403. Disponível em: https://ejournal.papanda.org/index.php/jirpe/article/view/1403. Acesso em: 21 jan. 2026.