<![CDATA[This study aimed to determine the effect of the Teams Games Tournament (TGT) cooperative learning model assisted by UNOBIOSIS card media on the science concept understanding of third-grade students at SDN 5 Selong. This study employed a quasi-experimental research design using the Nonequivalent Control Group Design. The research sample consisted of 59 students, including 29 students in Class III-A as the experimental group and 30 students in Class III-B as the control group. The experimental group was taught using the TGT cooperative learning model assisted by UNOBIOSIS card media, while the control group was taught using the Student Teams Achievement Division (STAD) cooperative learning model. Data were collected using a 10-item multiple-choice test on science concept understanding that had been validated and proven reliable. The data were analyzed using descriptive statistics and inferential statistics through the Independent Samples t-test with the assistance of SPSS version 30. The results showed that the mean posttest score of the experimental group was 74.8, while that of the control group was 65.7. The Independent Samples t-test yielded a significance value (2-tailed) of 0.003 (< 0.05), indicating a statistically significant difference between the two groups. Therefore, it can be concluded that the Teams Games Tournament (TGT) cooperative learning model assisted by UNOBIOSIS card media has a positive and significant effect on the science concept understanding of third-grade students at SDN 5 Selong.]]>
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