Abdel-Salam Al-Hafidh M, Abdel-Salam Mohammed Z. The Effect of Chemistry Teaching According to Learning Dimensions Model on the Development of Chemical Concepts and the Meta-Cognitive Skills for First Grade Secondary Students. BERJ [Internet]. 2014 Jun. 1 [cited 2025 Oct. 25];13(1):79-120. Available from: https://stats.uomosul.edu.iq/index.php/berj/article/view/39522