This study is motivated by the low learning outcomes of Science (IPAS) students. Therefore, this research aims to examine the effect of implementing the Cooperative Learning Model: Student Teams Achievement Division (STAD) assisted by Question Ball media on Science learning outcomes for fourth-grade students at SD Negeri 01 Tiumang. This research employs a quantitative approach with a quasi-experimental design using a one-group pretest-posttest design. The population of this study consisted of all fourth-grade students at SD Negeri 01 Tiumang, with a saturated sampling technique used to select the sample. Data collection was done using a test with a set of questions as the instrument. After applying the Cooperative Learning Model: Student Teams Achievement Division (STAD), the average pretest score was 56, and the posttest score was 72, indicating an improvement in posttest scores. Based on the analysis using non-parametric tests, the asymptotic significance (2-tailed) value was 0.000, which is smaller than 0.05, thus the hypothesis is accepted. This indicates that there is a significant difference between the pretest and posttest results. Therefore, it can be concluded that the implementation of the Cooperative Learning Model: Student Teams Achievement Division (STAD) with Question Ball media has a positive effect on Science learning outcomes for fourth-grade students at SDN 01 Tiumang.
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