When table-1 is examinated , arithmetic mean of experimental group is 22,40, arithmetic mean of control group is 20.40. When the pre-test results of the experimental and control groups are compared ,there is not a significant difference between the achievements of the groups according to the results of the independent t-test before the
application (t(48)=0,524; p>.05). These findings shows that experimental group students, together learning technique which is based on cooperative learning method is applied, and control students , who traditional learning method is applied have knowledges about GCD-IPPC which are so close to each other. This situation shows that groups chosen for research have similar samples.