Mudaly, Vimolan, and Jayaluxmi Naidoo. “The Concrete-Representationalabstract Sequence of Instruction in Mathematics Classrooms”. Perspectives in Education 33, no. 1 (March 31, 2015): 42–56. Accessed May 5, 2024. https://journals.ufs.ac.za/index.php/pie/article/view/1895.