UPAYA MENINGKATKAN KEAKTIFAN DAN PRESTASI BELAJAR MATEMATIKA MELALUI MODEL PEMBELAJARAN NUMBERED HEADS TOGETHER PADA SISWA KELAS VIIB SMP N 3 MUNTILAN

the purpose of this research is to improve the activity and mathematics students’ achievement of class VIIB SMPN3 Muntilan through cooperative learning model NHT (Numbered Heads Together). This research is Classroom Action Research (CAR) conducted in two cycle. The subjects of this research is students of class VII B SMPN 3 Muntilan. Data collection techniques in this research uses observation, tests and documentation.The results showed that after apply the cooperative learning model NHT in class VIIB SMPN3 Muntilan, activity and mathematics achievement of students has increased