“…This clearly indicates that teachers should have the necessary knowledge and skills regarding these learning areas. However, studies emphasize that teachers/pre-service teachers have various difficulties regarding the knowledge of content and students in the learning area of numbers (Ball et al, 2001;Crespo, 2000;Didiş et al, 2014;Moyer & Milewicz, 2002;Tirosh, 2000, Turnuklu & Yesildere, 2007. For example, they experienced difficulties in eliciting students" thoughts (Turnuklu & Yesildere, 2007).…”