This study aimed to examine the effect of using the Solar System Scope simulation media with three-dimensional visualization on sixth-grade students' understanding of the solar system concept at SD Negeri Pekuncen 01. This quantitative study employed a One-Group Pretest-Posttest Design involving 24 students. Data were collected through tests and documentation and analyzed using the Shapiro-Wilk test, Wilcoxon Signed Rank Test, and N-Gain analysis. The results showed a significant difference between the pretest and posttest scores (p < 0.05). The average N-Gain score of 0.2476 indicated an improvement in students' conceptual understanding after the implementation of the learning media. Therefore, the Solar System Scope simulation media can improve elementary students' understanding of the solar system concept.
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