78 Tuğba Horzum, Melihan Ünlü
Acta Didactica Napocensia, ISSN 2065-1430
technology have been classified in literature in two steps: First order (external) and second order
(internal) factors (Ertmer, Addison, Lane, Ross, & Woods, 1999). As the deficiencies of software and
hardware apart from proficiency of teacher, the inadequateness of trainings that are provided for pre-
service teachers-teachers-academicians, the deficiencies of managers about the support for using
technology, the inadequateness of physical conditions of classes and school, crowded classes, the lack
of experts who should provide technical support, the lack of economic resources, the lack of time that
is necessary for making arrangements to integrate technology into class are classified as first order
factors; the factors that stem from teachers as lack of knowledge about use of technology, low level of
self-efficacy, negative attitudes, lack of motivation, the problem that they are not technology literate
are the second order factors. Despite these difficulties about integration of technology into class
environment, technology is considered as a means of improving quality and accessibility of education
by researchers and many teachers (Van De Walle et al., 2012/2010).
With the use of technology and computers in the classroom environment, the concept of computer-
assisted teaching emerged. In recent years, for computer-assisted mathematics teaching, computer
algebra systems and dynamic geometry software (DGS) programs have been developed (Davenport,
1994; Sträßer, 2001, 2002). One of the DGS programs is GeoGebra showing the multiple
representations of objects (Aktümen, Yıldız, Horzum & Ceylan, 2011). Developed by Markus
Hohenwarter, this software program includes both the features of computer algebra systems and DGS
programs (Hohenwarter & Jones, 2007); thus offers many opportunities for its users (Dikovic, 2009;
Hohenwarter & Preiner, 2007).
GeoGebra can be used as a tool in the training of PMTs. Because it is strongly believed that the use of
this program in the classroom environment by PMTs will contribute them to teach mathematics. In
fact, research has revealed that mathematics teachers should possess a profound grasp of mathematics,
should understand how students learn mathematics by considering their individual differences and
should select instructional tasks and strategies that can promote learning in order to increase the
quality of mathematics education (Shulman, 1986; Van De Walle et al. 2012/2010). In addition,
research also indicates that teachers did not use the technology in their class because of not having
enough knowledge about the technology integration (Karagiorgi & Charalambous, 2004; Niess, 2005).
Thus, teachers need to acquire knowledge, skills, attitudes and habits in order to adapt to technology,
to understand technology, and to take advantage of opportunities offered by technology (Mishra &
Koehler, 2006). It is thought that it is important to change attitudes, skills and habits at the desired
level (Ertmer & Ottenbreit-Leftwich, 2010) and to acquire the necessary knowledge for mathematics
teachers before starting their professional career. Thus, the content of undergraduate teacher training
programs can be organized to achieve these objectives. As a matter of fact, as what can be done by
students through DGSs particularly while learning the subjects related to geometrical figures is
considerably different from what can be done without computer, the mathematics education to be
conducted by using DGS programs will be both changeable and improvable (Van De Walle et al.,
2012/2010, p.117). Hence, PMTs should be able to use GeoGebra activities in their lessons, and be
able to design and to have the skills to use GeoGebra activities. On the other hand, research states that
teachers' beliefs and views influence the learning environments they create in their classrooms (Ball,
1998). Therefore, it is believed to be of great importance to investigate the views of PMTs about
GeoGebra after they have learned how to design GeoGebra activities to be used in their classrooms.
When the literature was reviewed, studies investigating PMTs’ (Agyei & Benning, 2015; Baltacı,
Yıldız, & Kösa, 2015; Kutluca & Zengin, 2011; Zengin, Kağızmanlı, Tatar, & İşleyen, 2013) and
mathematics teachers’ (Aktümen, et al., 2011; Kaleli-Yılmaz, 2015; Zakaria & Lee, 2012) views about
the use of GeoGebra in math classes were found. In their study, Zengin et al. (2013) indicated that the
PMTs think that the use of GeoGebra can lead to positive outcomes such as facilitating understanding,
increasing retention and concretization. Baltacı et al. (2015) reported that elementary mathematics
teachers are of the opinion that GeoGebra facilitates thinking by encouraging reasoning and
interpretation. In addition, there are some studies exploring the learning processes regarding subjects
such as calculus (Dikovic, 2009; Majerek, 2014), probability (Radakovic & Aizikovitsh-Udi, 2012),
translation and rotation transformations (Baltacı & Baki, 2016), analytic geometry (Baltacı & Yıldız,
2015), geometrical reflection (Seloraji & Kwan-Eu, 2017). These researches found that GeoGebra is
effective in teaching of such subjects. In the current study; on the other hand, the purpose is to