KASMIR , N. . Peningkatan Kemampuan Problem Solving dalam Matematika melalui Model Problem-Based Learning di MI Negeri 3 Halmahera Utara . EduSpirit : Jurnal Pendidikan Kolaboratif, [S. l.], v. 2, n. 1, p. 275–278, 2025. Disponível em: https://journal.makwafoundation.org/index.php/eduspirit/article/view/1118. Acesso em: 9 jul. 2025.