Meshkinfam, Mojdeh, Ali Akbar Khosravi Babadi, Lotfollah Abbasi Sarvak, and Kambiz Poushaneh. “Validating and Presenting of the Curriculum Pattern of Multi-Grade Classes of Elementary School”. Iranian Journal of Educational Sociology 6, no. 4 (June 21, 2022): 86–95. Accessed June 12, 2025. https://qijes.com/index.php/ijes/article/view/1195.