“The Effect of Employing the Strategy of Numbered Heads in the Development of Scientific Thinking Skills in Science Subject for Sixth Grade Students (An Experimental Study on a Sample of Sixth Grade Students in Science in Damascus)”. Damascus University Journal of educational and Psychologyical sciences 36, no. 2 (July 29, 2021). Accessed June 18, 2026. https://journal.damascusuniversity.edu.sy/index.php/eduj/article/view/741.