The aim of this study was to investigate the effects of the applications of learning together and group investigation methods at different intervals on the features of cooperative learning model. The study sample comprised the sixth, seventh and eighth grade students studying in a public middle school. In the first year of the application, continuing for two years, this study was conducted with sixth and seventh grade students and in the second year, a year later, the same students who graduated to the seventh and the eighth grade and an additional seventh and eighth grade class that had not participated before were included in the study. In the experimental groups, classes were applied Learning Together and Group Investigation methods. The data collection tool used was Cooperative Learning Model Opinion Scale. According to the findings obtained by the scale, the effectiveness of Learning Together and Group Investigation methods were determined by the experimental design applied. In general, it can be said that applying of the methods twice in two years has developed the features of the cooperative learning model.