The purpose of this research is to analyze the effectiveness of student learning by using group discussion method. This research was conducted in seventh grade student of SMPN 1 Sungai Kunyit, Pontianak Regency, in the academic year of 2013/2014 by using classroom action research. The research subjects were the grade seven students that consisted of 31 students chosen by using random sampling. The data were collected by using test and the action was applied by using classroom action research. The action was applied in 3 cycles on “history of Indonesia Independence”. Every cycle consisted of four stages namely planning, action, observation and reflection. The finding of this research indicated that before conducting the action, there had not been any student who achieved the minimum mastery level. After conducting the first action, the students' learning was recorded for 58.50. In second implementation of the action, the score increased to 67.09. After the implementation of cycle 3, the score again increased to 76.93 that exceeded the minimum completion criteria that had been determined by school or civic education subject. This research concludes that the application of Group Discussion Method in civic education in SMPN 1 Sungai Kunyit improves the students' learning outcome.