Research design

     There were experimental classes and control classes in this study. 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 cuboid and did this in a double section of each meeting. In other words, the control group students did activities without using dynamic geometry content, and the experimental group students learned geometry using Geogebra content. The collaborative teacher developed her own lesson activities with mathematics books.