Tolba EGA. The Effect of The Interaction between Worked – Examples Strategy with Self Explanations and Prior Knowledge in The Development of Scientific Concepts and Well –and ill-Structured Physical Problems Solving with First-Graders Secondary Students "Interpreta. Int J Talent Development [Internet]. 2015 Oct. 19 [cited 2024 Nov. 15];6(2). Available from: https://journals.ust.edu/index.php/IJTD/article/view/920