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Diterima: 12 Oktober 2018 Disetujui: 25 Juni 2019 Abstract: The purpose of this study is to improve the learning process and improve the ability of mathematical connections through the application of the Cooperative Learning model Student Teams Achievement Division, the form of this research is Classroom Action Research. The subjects in this study were students of class VII1 SMP Negeri 20 Pekanbaru with heterogeneous academic abilities. The study was conducted in the even semester of the academic year 2013/2014 consisting of two cycles. Data collection techniques used in this study were tests of mathematical connection ability at the end of the cycle, and observation sheets of teacher and student activities. The results of this study indicate that there is an improvement in the learning process from cycle I to cycle II and an increase in mathematical connection abilities. Increased mathematical connection ability can be seen from the scores on the mathematical connection ability test I (TKKM I) there is an increase from the basic score. The percentage on the base score is 36.42% while the percentage on the TKKM I score is 61.25%. Increased mathematical connection ability can also be seen from an increase in TK2M II score of 90.25%. From the results of the above research it can be concluded that the application of the Cooperative learning model of Student Teams Achievement Division can improve the learning process and improve students' mathematical connection skills in mathematics in class VII1 of SMP Negeri 20 Pekanbaru in the academic year 2013/2014 especially in the material of triangles and quadrilateral.

instructional development journal

Penerapan Model Pembelajaran Kooperatif Tipe Student Teams Achievement Division untuk Meningkatkan Kemampuan Koneksi Matematis Siswa Kelas VII1 SMP Negeri 20 Pekanbaru