A Study on the Possibility of Assessing Children’s Development Using an Exercise Workbook Based on the Kumon Method: A Case from the Preparatory Group of Preschool Education. Journal of Interdisciplinary Insights, [S. l.], v. 3, n. 4, p. 63–66, 2026. DOI: 10.5281/. Disponível em: http://gipublishing.org/index.php/jis/article/view/108.. Acesso em: 9 jan. 2026.