KHOLID, I. The effectiveness of the Project-Based Learning (PjBL) approach in teaching mathematical modeling at the elementary school level: A systematic literature review. Priviet Social Sciences Journal, [S. l.], v. 6, n. 4, p. 459–472, 2026. DOI: 10.55942/pssj.v6i4.1341. Disponível em: https://journal.privietlab.org/index.php/PSSJ/article/view/1341. Acesso em: 29 apr. 2026.