4.3. Observation Data AnalyzeObservation divide two activities in experiment class, they are teacher activities and student activities. Teacher activities observed by colleague and physics teacher.student activities observed by researcher. The student activities will show in figure 3. Based on figure 1 showed percentage observation of student activities inlearning process. Each class having 40 students. In experiment class, students divided eight groups which consist of fives students. In the first meeting, thepercentage was 50,3 %. In the next meeting, the percentage was 69,9%. And thelast meeting the percentage reached 77,8%..