<![CDATA[This research aims to determine the effect of geogebra-assisted learning based on Indonesian batik on students' computational thinking. This research uses the Quasi Experiment Design method with the non-equivalent group design. Hypothesis testing uses the non-parametric Mann-Whitney U Test because the data is not normally distributed. The test was carried out using the IBM SPSS Statistics 25 program. This research was carried out at SMPN 8 Madiun on 4 - 18 September 2023 with geometric transformation material. The population in this study were all class IX students at SMPN 8 Madiun, totaling 219 students. The samples were taken randomly, with 26 class IX A students as the control class and 23 class IX E students as the experimental class. The instrument of this research is a computational thinking test. This test is needed to measure students' CT in learning geometric transformation material after the treatment is given. Before the instrument is administered, validity and reliability are proven. The research results show that based on the "Test Statistics" output in the Mann-Whitney test, it is found that the value of Asymp. Sig. (2-tailed) of 0.000 is smaller than <0.05 probability value, then Ho is rejected. Thus, there is a difference in students' CT test results between classes with geogebra-assisted learning based on Indonesian batik and conventional classes with an average experimental class score of 81.52 and an average conventional class score of 50.46. Because there are significant differences, it can be concluded that there is an influence of geogebra-assisted learning based on Indonesian batik on students' CT. Keywords: Geogebra, Geometric transformation, Computational Thinking, Batik Nusantara]]>
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