SURGANINGSIH, M.; AMAL, A. .; RAMADANI, N. I.; AFIFAH, F.; SURAS, F. E. Cognitive Development: Enhancing Classification Skills in 5- to 6-Year-Olds Through Structured Manipulative Learning. Ihya Ulum: Early Childhood Education Journal, [S. l.], v. 4, n. 1, p. 685–696, 2026. DOI: 10.59638/ihyaulum.v4i1.811. Disponível em: https://jurnal-fkip-uim.ac.id/index.php/ihyaulum/article/view/811. Acesso em: 4 jun. 2026.