mahmood lecturer dr.mohib. Comparison between the Strategy of Opposite class and the Strategy of Jigsaw Integrative,in the Performance by the Students of physics Department, for the Applications of Measurement and Evaluation. BERJ [Internet]. 2021 Mar. 1 [cited 2025 Oct. 26];17(1):1-34. Available from: https://moss.uomosul.edu.iq/index.php/berj/article/view/39050