Develop a mathematical model of the grading scale to make Examinations are an effective method. Journal of the College of Basic Education, [S. l.], v. 15, n. 56, p. 661–668, 2023. DOI: 10.35950/cbej.v15i56.9409. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/9409.. Acesso em: 2 jul. 2024.