Project-Based Learning in Promoting Cognitive Development in Early Childhood: A Systematic Literature Review. Journal of Early Childhood Education Research , [S. l.], v. 2, n. 2, p. 65–74, 2026. DOI: 10.58230/jecer.v2i1.566. Disponível em: https://ssed.or.id/jecer/article/view/566. Acesso em: 15 oct. 2026.