JITSAI, L. The Development of an Effective School Management Model to Enhance Student Quality through the Application of the 9-Step Ladder Concept: Loei Provincial Administrative Organization School 1. Journal of Innovation and Learning Sciences, [S. l.], v. 18, n. 2, p. 34–50, 2026. Disponível em: https://so02.tci-thaijo.org/index.php/EDGKKUJ/article/view/283845. Acesso em: 16 sep. 2026.