“ The Impact of Perkins and Blith Model on the Achievement of Second Grade Intermediate Students in the Subject of Social Studies”. Journal of the College of Basic Education 26, no. 106 (March 13, 2020): 1–19. Accessed July 23, 2024. https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/4882.