Research method
3.1 Research design
There were experimental classes and control classes in this study so the experimental and control classes have different treatments. The control class uses learning materials developed by researchers and taught by researchers. The control classes taught by co-teachers and there were using their own formal teaching methods. The researchers developed learning material in which the students in the experimental class could learn the geometric subject of the parallelepiped, cube and did this in a double section of each meeting. In other words, the control group students did activities without using dynamic geometry software, and the experimental group students learned geometry using Geogebra software. The collaborative teacher developed her own lesson activities with mathematics books.
3.2. Data collection methods
To answer the main research question, the we used a pretest, a posttest as data sources. Before the experimental teaching of the parallelepiped concept starts, both classes did a pretest and after the teaching of this topic ended, both classes did a posttest. The pre-test and the post-test were not exactly the same, but they did on the same topic.
3.3. Research sample
Participants in this study were high school students from Bayankhongor
Province and Ulaanbaatar Mongolia, which are listed in the table.