ERVIANA, V. Y.; DIVIA, B.; YIHENG, M. The Effectiveness of Problem-Based Learning on Elementary Students’ Critical Thinking and Problem-Solving Skills. International Journal of Learning Reformation in Elementary Education, [S. l.], v. 5, n. 01, p. 16–30, 2026. DOI: 10.56741/IISTR.ijlree.001330. Disponível em: https://journal.iistr.org/index.php/IJLREE/article/view/1330. Acesso em: 8 oct. 2026.