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Abstract
This study aims to analyze the effect of the application of contextual teaching materials on the mathematical reasoning and communication skills of grade VIII students. The research method used was quasi-experimental with a nonequivalent control group design. The research subjects consisted of 45 students from one MTS which were divided into experimental classes and control classes. Instrument penelitian meliputi tes penalaran matematika dan komunikasi matematika yang diberikan pada pretest dan posttest. Data analysis used paired t-tests and MANCOVA to determine the difference in ability between groups after controlling for pretest scores. The results of the study show that the use of contextual teaching materials has a significant effect on improving students' mathematical reasoning and communication skills compared to conventional learning.
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