Implementation of Problem-Solving Model to Improve Students’ Mathematical Problem-Solving Ability at SD Negeri 4 Bandar Baru. DEEP LEARNING: Journal of Educational Research, [S. l.], v. 1, n. 3, p. 72–81, 2025. DOI: 10.62945/deeplearning.v1i3.244. Disponível em: https://ejournal.mgedukasia.or.id/index.php/deeplearning/article/view/244. Acesso em: 7 dec. 2025.