الحسيني حن. The effect of using the problem-solving method in developing mathematical thinking among fourth-grade preparatory students in Najaf Governorate. Kufa_art [Internet]. 2018 Apr. 3 [cited 2026 Sep. 23];1(35):155-76. Available from: https://journal.uokufa.edu.iq/index.php/kufa_arts/article/view/6205