Abstract :
This study aims to determine whether there is effect of NUMBER HEAD TOGETHER education learning model towards mathematics learning achievement in junior high school students in class VII. The research method in this study is an experimental study with a research design is one group pre-test and post-test design. The data in this study is pretest and posttest data of the experimental class data obtained were analyzed using SPSS version 16.0. prior to testing hypotheses, normality test for data pretest and posttest of the data analysis results obtained by the Sig. (2-tailed) = 0,439 > 0,05. While Dtabel calculated as = 0,189 = 0,296. Thus H0 is accepted, which means normal distribution of data, while data posttest value Sig. (2-tailed) = 0,125 > 0,05. whereas Dtabel =0,322 = 0,296. Thus H0 is accepted, which means normal distribution of data. Testing the hypothesis in this study is paired sample test sig. (2-tailed) = 0.025 < ttabel = 3,644. So that means reject H0 . There is effect of realistic mathematics education model on the learning achievement in junior high school students class VII. These results indicate that the learning model Numbered Head Together education effect on mathematics learning achievement in junior high school students class VII therefore the authors suggest for teachers to use learning model realistic mathematics edutaion as a learning model that can be used in the classroom in accordance with the material being taught.