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). مجلة للعلوم التربوية والنفسية. 2021;36(2). Accessed June 18, 2026. https://journal.damascusuniversity.edu.sy/index.php/eduj/article/view/741