Abstract
The background of the problem in this study originated from students' mathematical critical thinking skills that are still low. One way to overcome these problems is to use Jigsaw cooperative learning. This study aims to determine the effect of the use of jigsaw cooperative learning on the ability to think critically mathematically elementary school students. The method used in this study is a quasi-experimental method with nonequivalent groups pretest-posttets design. The subject of this research is the fifth grade students of SD Negeri Andir Kidul 1, Bandung Municipality. The instrument used was a test item to measure students' mathematical critical thinking skills. Based on the results of data analysis using the t test at a significance level of 0.05, from the t test results obtained 0.192 results. So it can be concluded that Jigsaw cooperative learning has a significant influence on students' mathematical critical thinking skills.
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