Measuring the Difficulty of Achievement Test Items in Mathematics for Fifth Grade Students (A Comparative Study between the Classical Theory and the Item Response Theory). Journal of Hama University , [S. l.], v. 8, n. 1, 2025. Disponível em: https://journal.hama-univ.edu.sy/huj/article/view/2561. Acesso em: 6 jun. 2026.