<![CDATA[The purpose of this research is to determine if sixth graders at SDN 1 Sedayu can improve their solar system-related critical thinking abilities by using an AR-augmented project-based learning (PjBL) paradigm. Both the control and experimental groups' pre- and post-test scores increased significantly. A post-test average of 79.61 was achieved by the experimental class, whose average pre-test score was 56.92, while a post-test average of 60.27 was achieved by the control class, whose average pre-test score was 50.31. The data were first examined for normality and homogeneity using the Kolmogorov-Smirnov and Levene tests, which confirmed that the samples were distributed normally and were similar to one another. Only then were hypothesis testing initiated. After doing hypothesis testing using a paired sample t-test, the null hypothesis (H0) was rejected due to a significance value of 0.00, which is less than 0.05. These findings demonstrate a notable difference between the two groups and demonstrate that students' critical thinking abilities are improved with the use of AR-assisted PjBL. Consistent with other findings, this study confirms that PjBL and AR effectively boost students' motivation, engagement, and critical thinking abilities. ]]>
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