After math literacy ability tests carried out on the learning model of realistic approach assisted Edmodo CPS and CPS models to the study of realistic approach, acquired three groups of students, that is, a group of top, Middle group, and the Group down. Based on the results of the triangulation of the test results, the now, and the interview against the subject of the research, results obtained that the subject group representing over on second class eskperimen IE S-4, S-6, S-6, and S-05 has met all the indicators of the ability of mathematical literacy. Based on the results of the study it can be concluded that the top has the ability of mathematical literacy good. This is shown with the correct fulfillment of all indicators in the process of mathematical literacy abilities i.e. covers, communication, mathematizing, representation, reasoning and argument, devising strategies for problem soving, using symbols, and using tools. The subject of the S-4 and S-18 smoothly in resolving the problem with the steps in order and clear and complete the questions with the right calculations, and can deduce the answer. The second subject is not having trouble working on problem oriented towards PISA. This can happen, because with a realistic approach to CPS learning assisted Edmodo, students accustomed to working on problems related to daily life so as to resolve the problem of PISA. This is in line with the research conducted by Istiandaru (2014) which concluded that learning with the use of realistic approach can help students realize the usefulness of mathematics in everyday life.
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