<![CDATA[This study was motivated by the low learning outcomes of fourth-grade students in Class IV-A at SDN Margorejo 1/403 in Surabaya regarding the topic of Indonesian Cultural Diversity. These low learning outcomes were attributed to monotonous teaching methods and the use of unengaging learning media. This classroom action research aims to improve the learning outcomes of fourth-grade students on the topic of Indonesian Cultural Diversity through the use of dioramas. The research method used was Classroom Action Research (CAR), conducted in two cycles. The stages carried out in each cycle were planning, implementation of actions, observation, and reflection. The research subjects consisted of 24 students in Class IV-A for the 2025/2026 academic year. Data collection was conducted through observation, evaluation tests, and documentation. The research results indicate that the use of diorama media can significantly improve student learning outcomes. In the pre-cycle phase, student mastery reached only 29.2% with an average score of 64.79. After implementing the diorama media in Cycle I, the mastery rate increased to 58.3% with an average score of 76.25. Furthermore, in Cycle II, the average score increased to 94.38 with a learning achievement rate of 87.5%. The diorama medium not only improved learning outcomes but also increased student participation, engagement, and attention during learning activities. Thus, the use of the diorama learning medium for the topic of Indonesian cultural diversity in elementary schools has proven effective in improving student learning outcomes.]]>
