“…In fact, researchers seeking to obtain consumers' opinions on mathematics textbooks' features have emphasized that a quality textbook is important for mathematics teaching . Similarly, researchers investigating the role of mathematics textbooks have expressed that textbooks are an important tool in the application of mathematics curricula Herbel-Eisenmann, 2007;Randahl, 2016). Consequently, studies investigating the features and roles of mathematics textbooks dominate both the national and international literature (Benesh & Boester, 2012;Kaya, 2008;Keleş, 2014;Weinberg, Wiesner, Selden & Shepherd, 2013;Zeringue, Spencer, Mark, Schwinden & Newton, 2010).…”