1.
al-hamdany entithar. The impact of the constructive John Zahrek model on the achievement of the third -grade students in mathematics and the development of their side thinking. BERJ [Internet]. 2022 Sep. 1 [cited 2025 Oct. 26];18(3):249-76. Available from: https://moss.uomosul.edu.iq/index.php/berj/article/view/37962