MUSTADI, Mustadi. The Effectiveness of Project-Based Learning Methods in Improving the Problem-Solving Skills of Children Aged 5-6 Years. The Lil Atfal Journal of Childhood Education, [S. l.], v. 1, n. 1, 2025. Disponível em: https://alkhoiriyahjournal.e-jipi.com/index.php/Lilathfal/article/view/1. Acesso em: 16 apr. 2026.