Bempeni, Maria, and Xenia Vamvakoussi. “Individual Differences in students’ Knowing and Learning about Fractions: Evidence from an in-Depth Qualitative Study”. Frontline Learning Research 3, no. 1 (April 1, 2015): 18–35. Accessed May 26, 2022. https://journals.sfu.ca/flr/index.php/journal/article/view/132.