CELIKKOL, O. IMPACTS OF THE SCHOOL STARTING AGE ON ACADEMIC ACHIEVEMENT. International Online Journal of Education and Teaching, [S. l.], v. 10, n. 4, p. 2322–2330, 2023. Disponível em: https://iojet.org/index.php/IOJET/article/view/1966. Acesso em: 29 dec. 2025.