<![CDATA[This research was motivated by the low argumentation skills of fourth-grade students at SDN 09 Koto Baru, who tended to be passive and faced difficulties in expressing logically structured opinions. This study aimed to examine and describe the effect of using the Talking Chips cooperative learning model on students' argumentation skills based on Toulmin's argumentation components (Claim, Data, Warrant, and Rebuttal). The research utilized a quantitative approach with an experimental method through a Pre-Experimental Design in the form of a One-Group Pretest-Posttest Design. The research sample consisted of a saturated sample of 23 fourth-grade students. The data collection instrument employed an oral test based on contextual dilemma stories evaluated using an observation sheet of argumentation skills adapted from Toulmin's model with a 1-4 scale. The data were analyzed using the Paired Samples T-Test and Normalized Gain (N-Gain) Score analysis. The results indicated a significant increase in the classical mean score of argumentation skills, rising from 31.39 in the pre-test to 77.65 in the post-test. Based on the hypothesis testing, the obtained was -29.969 with a significance value (2-tailed) of 0.000 < 0.05, thereby rejecting the null hypothesis ( ) and accepting the alternative hypothesis ( ). Furthermore, the classical N-Gain analysis yielded a score of 0.682 (68.2%), which falls into the moderate category and is interpreted as quite effective. In conclusion, the Talking Chips cooperative learning model has a significant effect on improving the argumentation skills of fourth-grade students at SDN 09 Koto Baru in Pancasila Education subject.]]>
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