Özkubat, Ufuk, Alpaslan Karabulut, and Emine Rüya Özmen. 2020. “Mathematical Problem-Solving Processes of Students With Special Needs: A Cognitive Strategy Instruction Model ’Solve It!’”. International Electronic Journal of Elementary Education 12 (5):405-16. https://iejee.com/index.php/IEJEE/article/view/1083.