This study was motivated by the low learning outcomes of fourth-grade students in the IPAS subject at SD Negeri Selomerto, where learning was still dominated by conventional methods. The research aimed to determine the effect of using Augmented Reality (AR) media based on Assemblr Edu on students' learning outcomes in the topic of Cultural Diversity and Local Wisdom. This study employed a quantitative approach using a quasi-experimental method with a nonequivalent control group design. The sample consisted of 52 students divided into an experimental class and a control class, each comprising 26 students. Data were collected through observation, tests (pretest and posttest), and documentation. Data analysis included validity testing, reliability testing, normality testing, homogeneity testing, Independent Sample t-Test, and N-Gain analysis. The results showed that the experimental class achieved a higher average posttest score (89.81) than the control class (74.04). The N-Gain score of the experimental class was 0.7546 (high category), while the control class obtained 0.3799 (moderate category). The Independent Sample t-Test revealed a t-value of 6.122, which was greater than the t-table value of 2.009, with a significance value of less than 0.05. These findings indicate a significant difference in learning outcomes between the two groups. Therefore, the use of Augmented Reality (AR) media based on Assemblr Edu is proven to be effective in improving IPAS learning outcomes among fourth-grade students at SD Negeri Selomerto.