Conclusions and Suggestions
The results of this research showed that access levels between the experimental group which learning together was applied, and control group which traditional methods were applied a significant difference in secondary school 9 th grade math class. According to post-test scores, it was determined as statistical that achievement mean of the experimental groups is beter than achievement mean in the control group at the end of the study. It was thought that the most significant contribution to the achievement of cooperative learning groups is interaction between students (Simsek, 1994).Literature supports that cooperative learning promotes achievement as well as other positive
affective outcomes at the elementary and middle-grade levels ( Johnson, Nelson, & Skon, 1981). Other researchers have reported similar findings that point to the achievement benefits associated with studying mathematics in cooperative learning groups at lower grade levels (Johnson, Maruyuma, Edwards, Devries, & Snyder, 1972). This study was made by the help of the together learning technique which is based on cooperative learning method to examine the 9 th grade effect on students' achievements in mathematics class. A similar study on can be researched for different courses, subjects and grade levels. The other cooperative learning techniques' effects on achievement of the students can be examined in future researches.