This study was motivated by problems observed in Grade V at UPTD SD Negeri Hombol, where teachers still employed conventional learning models, resulting in students’ learning activities being insufficiently directed and focused, and their learning outcomes not yet meeting the established minimum criteria. This study aimed to determine the effectiveness of the Teams Games Tournament (TGT) learning model assisted by Snakes and Ladders media in improving students’ mathematics learning outcomes on plane geometry. A quantitative approach with a pre-experimental method using a one-group pretest-posttest design was employed. The subjects were all 44 fifth-grade students at UPTD SD Negeri Hombol, selected using saturated sampling. Data were analyzed using a normality test and a paired-samples t-test. The results showed that the mean pretest score was 59.36, while the mean posttest score increased to 78.49. Hypothesis testing using the paired-samples t-test yielded tcount = 13.138 and tval = 1.681. Therefore, the TGT learning model assisted by Snakes and Ladders media was effective in improving students’ mathematics learning outcomes compared with the previously implemented conventional learning model.
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