HARAHAP, P. N.; WAHYUNI, S.; HARAHAP, L. S. Efforts to Improve Mathematics Learning Outcomes Using the Problem Based Learning Model in Grade III Students of SDN 067240 Medan. Jurnal Riset Ilmu Pendidikan, [S. l.], v. 5, n. 2, p. 402–407, 2025. DOI: 10.56495/jrip.v5i2.1056. Disponível em: https://jurnal.larisma.or.id/index.php/JRIP/article/view/1056. Acesso em: 24 aug. 2025.