The effectiveness of Numbered Heads Together cooperative model to Civic Education learning Outcomes in Grade V Elementary School 36 South Pontianak. The purpose of this study was to describe the effect of Numbered Heads Together cooperative model to Civic Education learning Outcomes in Grade V Elementary School 36 South Pontianak. The method that used in this study is the pre-experimental design with experimental design one group pre-test post-test. Based on analysis of data obtained, the average results of pre-test is 61,36 and the average results of post-test is 72.64. Retrieved tcount 3.810 and ttable (α = 0,01) is 2.492, which means tcount> ttable (3.810> 2.4892), thus the hypothesis is accepted. And from the calculation of effect size (ES) ES obtained 0.96 with the criteria is high in the range of ES > 0.8. This means using Numbered Heads Together cooperative model to Civic Education learning Outcomes in Grade V Elementary School 36 South Pontianak