HARAHAP, Ahyana. Improving Students’ Conceptual Understanding through Problem Based Learning Model at SMP Negeri 3 Rao Selatan. Indonesian Journal of Education and Social Humanities, [S. l.], v. 1, n. 3, p. 30–36, 2024. Disponível em: https://journal.mgedukasia.or.id/index.php/ijesh/article/view/251. Acesso em: 10 mar. 2025.