“…In the literature, it was seen that a number of TPACK scales have been developed or adapted to different groups of participants including pre-service (Baran & Canbazoglu-Bilici, 2015;Canbazoglu-Bilici, Yamak, Kavak & Guzey, 2013;Cetin & Erdogan, 2018;Dikkartin-Ovez & Akyuz, 2013;Kaya & Dag, 2013;Koehler & Mishra, 2005;Pamuk, Ergun, Cakir, Yilmaz & Ayas, 2015;Sancar-Tokmak, Incikabi & Ozgelen, 2013;Schmidt et al, 2009;Zelkowski et al, 2013) and teachers (Altun, 2013;Lee & Tsai, 2010) to investigate pre-service and in-service teachers' TPACK and its relation with different variables. As it can be seen in the literature, many of the studies concentrated on assessing pre-service teachers' understanding of TPACK but there are a few studies that focused on TPACK of teachers and basically mathematics teachers'.…”