Aytaç Kurtuluş, İnci Ünlüer,. 2021. “Investigation of Conceptual and Operational Understanding Processes of Eighth Grade Students to Identities and Factorization”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12 (1):22-70. https://www.turcomat.org/index.php/turkbilmat/article/view/269.