Semirhan GÖKÇE, Arzu Aydoğan Yenmez, İlknur Özpınar. 2016. “Mathematics Teachers’ Opinions on Worksheets Prepared With GeoGebra”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 7 (1):164-87. https://turcomat.org/index.php/turkbilmat/article/view/111.