Rexhepi, Habib, and Vesna Makasevska. “The Impact of the Pirie-Kieren Theory on Developing Fraction Understanding in Third-Grade Students”. Journal of Curriculum Studies Research 6, no. 2 (October 14, 2024): 196-214. Accessed March 20, 2025. http://mail.curriculumstudies.org/index.php/CS/article/view/395.