Correia, P., Kristiani, K., Alves Cabral, P. and Fatima Soares, J. B. (2026) “Students’ understanding of question-level difficulty in thematic unit a textbooks in secondary education”, Journal Scientific of Mandalika (JSM) e-ISSN 2745-5955 | p-ISSN 2809-0543, 7(4), pp. 557-567. doi: 10.36312/10.36312/vol7iss4pp557-567.