This is done in an effort to obtain an equivalent group. These criteria are determined based on placement test results before pretesting. Matching the subject is done by pairing individuals based on certain criteria. Population in this research is all student of semester IV of academic year 2016/2017 Program of the Mathematics Education University of Singaperbangsa Karawang who contract Real Course of Analysis, and a sample of this research involves two groups of students selected using purposive sampling technique with matching the subject. The research design used was quasi-experimental with the design form of matching-only pretest-posttest control group design. Provision of treatment directed to improve student’s adaptive reasoning proficiency. The quantitative study is done through experimental research method by giving treatment through CRS theory implementation in Real Analysis lecture. The research approach used in this research is the quantitative approach.
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