This research was aimed at defining the effect of Realistic Mathematic
Education (RME) on students’ mathematical literacy ability and disposition. This
research applied the Posttest-Only Control Design. The population was all grade
VII students of SMP Negeri 4 Randudongkal. The Cluster Random Sampling was
used in this research and it gained class VII B as the experiment group and class
VII E as the controlled group. The data on students’ Mathematical literacy ability
were collected through the post-test, while the data of students’ mathematical
disposition were collected through questionnaires. The research hypothesis was
comparative with the right-side test. The data were analyzed using the Mann
Whitney test. With the significant value of 5%, it was revealed that students’
Mathematical literacy ability and disposition attending the learning process using
RME were better than those who were not. It could be concluded that the RME
learning method had a significant and positive effect on the students'
mathematical literacy ability and disposition.