This research is a class action research that aims to imrpove the learning process and increase mathematics achievement of the student by apply Discovey Learning model. The subject of this research is teh student of class XI MIPA 2 SMA Negeri 12 Pekanbaru at the first semester in academic year 2019/2020, with total of participant are 31 students, consists of 13 male and 18 female with heterogen…