Suphi Önder Bütüner. “The Learning Opportunities Presented by Mathematics Coursebooks Used in Middle Schools in Turkey on the Concept of Arithmetic Mean”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 11, no. 1 (April 30, 2020): 157–187. Accessed December 22, 2024. https://turcomat.org/index.php/turkbilmat/article/view/228.