Al Abed, Adnan, and Mohammed Al Baba. “The Effect of Using Roger Bybee Model on Understanding Arithmetic Operations on Regular Fractions and Decimals for Sixth Graders”. Dirasat: Educational Sciences 47, no. 2 (June 1, 2020): 1–18. Accessed December 3, 2025. https://dsr.ju.edu.jo/djournals/index.php/Edu/article/view/2163.