Effect of Problem-Solving Enrichment Activities on Mathematics Achievement. International Journal of Studies in Education and Science, [S. l.], v. 6, n. 3, p. 271–280, 2025. DOI: 10.46328/. Disponível em: https://ijses.net/index.php/ijses/article/view/2215. Acesso em: 29 aug. 2025.