In a research conducted by Presmeg (1991, cit. in Presmeg, 2006), the effect of teaching
visuality of teachers, whose visual preference ranges from visual to non-visual, on students were determined.
Students of teachers, who are in the middle group according to their teaching visuality, were more successful.
Therefore, a teacher’s views on mathematical initiative determines his/her in-class activities, thus the nature of the
class environment he/she creates (Philipp, 2007), and this environment also shapes students’ beliefs on the nature of
mathematics