The effect of using the problem-based learning model on the cognitive learning outcomes and motivation of students at junior high school. Innovations in Science Education and Practice, [S. l.], v. 2, n. 2, p. 77–87, 2026. DOI: 10.20961/kr0d8m47. Disponível em: https://journal.uns.ac.id/index.php/isep/article/view/2739. Acesso em: 7 apr. 2026.