The objective of this research is to determine the increase of mathematics student achievement with applying of the cooperative learning model of statistical material. This research is classroom action research (CAR) where the research subjects are students of grade XII MIPA 1 SMAN 8 Takalar as many as 33 students which were carried out in the even semester of the 2019/2020 school year. From the results of the study, it can be seen the percentage of classical completeness from the initial test (pre-test), cycle I, and cycle II. In the initial test before getting treatment using cooperative learning model, the average score of the student achievement test reached 60.21. Furthermore, after getting treatment, the learning outcomes test in the first cycle increased to 71.39, then there was an increase again in the second cycle to 78.12. Likewise, the achievement of the minimum completeness criteria (KKM) which is 72, namely the number of students who achieve the KKM score on the initial test is 14 students or 42.42%, in the first cycle it increases to 20 students or 60.60%, while in the second cycle, an increase of 26 students or 78.78%. So it can be concluded that there is an increase in student achievement seen from the test and the student achievement of KKM scores which increase significantly. while in the second cycle, an increase of 26 students or 78.78%. So it can be concluded that there is an increase in student achievement seen from the test and the achievement of KKM scores which increase significantly.