This research is motivated by mathematical logical thinking ability of students is still low. This research aims to investigate the improvement of students' mathematical logical thinking ability, through the application of learning models RESIK. The research that has been conducted is the kind of Classroom Action Research (CAR), a class XI student research subject IPA 1, amounting to 32 students. Test data and observations were analyzed quantitatively reinforced with subsequent documentation of all data obtained were analyzed by descriptive quantitative. The results showed that the mathematical logical thinking ability of students has increased in the second cycle with both criteria. Based on the observation sheet analysis, activity increased in the second cycle students in both categories, and the activities of teachers in both categories in each cycle. The results showed that the application of RESIK learning model can improve the ability to think logically mathematical students in class XI Science 1.
Kata Kunci: think logically mathematical, RESIK
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