IMPLEMENTASI PEMBERIAN PENGUATAN DALAM PEMBELAJARAN KOOPERATIF TIPE NUMBERED HEAD TOGETHER (NHT) UNTUK MENINGKATKAN AKTIVITAS DAN HASIL BELAJAR SISWA PADA SUB POKOK BAHASAN OPERASI HITUNGBENTUK ALJABAR DI KELAS VIIB SMP NEGERI 4 JEMBER TAHUN AJARAN 2012/2

Abstract : NHT is a learning method with numbering system, and NHT is a combination of reinforcement. The aims of this research is to know implementation of giving reinforcement in Cooperatif Learning Type NHT to increasing result of mathematic study and student’s activity to the students of class VII. Type of research is Classroom Action Research (CAR) and the study design used was a model scheme Kemmis dan Taggart study research design were consists of 4 phases include planning, action, observation, and reflection . The object of this research is VII B students of SMP Negeri 4 Jember and material was chosen operation of algebra. The method to collect the data are observation, interview, documentation, and test. According the result of research, the teacher activities in implementation of model cooperative learning type NHT and activities in giving reinforcement is increasing from cycle 1 to cycle 2, so with the student and group activity. Although the learning achievement at cycle 1 dodn’t reach the target with percentage 40,6 %, at the test cycle 2 it can reach the target with percentage 75 %. The result shows that the completeness of student’s activity and result learning has increased well. Key Words : Cooperative Learning type NHT, Reinforcemen