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This research aims to increase students' active critical thinking in Civics Learning by implementing the Discovery Learning Learning Model. The subjects in this research were class X DKV students at SMKN 2 Maros with a total of 34 students, consisting of 21 male students and 13 female students. The research method used in this research is Kemmis and Mc Taggart using a classroom action research design consisting of two cycles. In this research, it is a multiple choice test which is carried out at the end of the cycle. The results of this research show that student learning outcomes in cycle I obtained an average score of 60 and an average percentage score of 60%, while classical completeness was 60% in the sufficient category and continued in the next cycle in the second cycle actions obtained an average of 83 .0, the average percentage score of 83.0% with classical completeness of 90% is in the very good category. The results of the data in cycle II activities have met the KKM which has been determined by student learning outcomes in PPKn learning obtained in cycle I and cycle II, showing that there has been an average increase of 30%. Based on the research results, it can be concluded that the application of the Discovery Learning learning model can increase active critical thinking in PPKn learning for class X DKV students at SMKN 2 Maros for the 2023/2024 academic year.    

The purposes of this research are 1) to determine students' critical thinking skills without using the Discovery Learning learning model in Civics class VI MIN 12 Medan City, 2) to determine students' critical thinking skills using the Discovery Learning learning model in Civics class VI MIN 12 City Medan, 3) to determine the significant effect of the Discovery Learning learning model on students' critical thinking skills in Civics learning at MIN 12 Medan City. The research methodology uses a quantitative approach with the type of Quasy Experiment in the form of Nonequivalent Control Group Design. This research was conducted at MIN 12 Medan City, Medan Tembung District. The sample in this study consisted of 2 classes, namely the experimental class and the control class. Collecting data in this study used the results of pre-test and post-test essay questions. The data analysis techniques used are descriptive, normality test, homogeneous test and Wilcoxon test. The results of this study show 1) the results of students' critical thinking without the application of the Discovery Learning model obtain an average posttest score of 75.77. 2) The results of students' critical thinking applied to the Discovery Learning model obtained an average posttest score of 78.27. This shows that there is a significant influence on the learning model media Discovery Learning on students' critical thinking skills. This is evidenced by the results of the Wilcoxon test with an asymp.Sig value of 0.000 <0.05, which means that there is a change in the average of the two paired samples, Ho is accepted and Ha is rejected.