Upaya Meningkatkan Minat dan Prestasi Belajar Matematika dengan Menggunakan Group Investigation Siswa Kelas VII C SMP Negeri 1 Kalibawang Kulon Progo

An effort to increase the students’ interest and achievement in learning mathematics through cooperative learning model type investigation group of students grade VII C SMP Negeri 1 Kalibawang, Kulon Progo in year 2013/ 2014. The type of this research is a classroom action research. The subject of the research are the students grade VII C SMP Negeri 1 Kalibawang, Kulon Progo. It consists of 34 students. The object of this research is students’ interest and achievement in learning mathematics through cooperative learning model type investigation group. The result of the study shows that after applying this learning model, students’ interest and achievement has an increase. Students’ interest has an increase in cycle I from 68,74% become 79,56% in cycle II from the observation sheet, whereas from the quesionnare the researcher found in cycle I from 74,46% become 87,84% in cycle II. Beside that, the subjection mean of students achievement has an increase. In pre-cycle shows 52,56 with Kriteria Ketuntasan Minimum (KKM) is 17,65% consist of 6 students, in cycle I has an increase become 65,63 with KKM is 50% consist of 17 students, whereas in cycle II shows the increse become 79,41 with KKM is 76,47% consist of 26 student