Hasan IF, Faris EJ. The impact of instructional design - learning according to the Kagan structures in the achievement of the first grade students in mathematics. Al-adab J. [Internet]. 2020 Mar. 15 [cited 2024 Nov. 22];2(132):181-204. Available from: https://aladabj.uobaghdad.edu.iq/index.php/aladabjournal/article/view/789