Badakhshan Toroghi, Esmat, Mahboobeh Soleimanpour Omran, and Rokhsareh Fazlli. “Validation of a Model for the Quality of Education in Multi-Grade Classrooms in Primary Schools”. Iranian Journal of Educational Sociology 5, no. 4 (June 21, 2022): 43–54. Accessed June 9, 2025. https://qijes.com/index.php/ijes/article/view/1104.