<![CDATA[This study aims to analyze the effect of using terrarium media assisted by the Discovery Learning model on improving students' contextual science understanding of ecosystem material. The problem found in the initial observation was the low level of students' conceptual understanding because learning relied more on visual media and teacher explanations without giving students the opportunity to observe ecosystem phenomena directly. This study used a One Group Pretest-Posttest design with 16 students from class VA of SD Inpres Madawat participating in both tests. Data were collected through learning outcome tests and documentation, while data analysis used the N-Gain formula to determine the effectiveness of learning. The results showed that the average pretest score was 0.41, which is in the moderate category. These results indicate that terrarium media assisted by Discovery Learning is effective in improving understanding of ecosystem concepts through concrete learning experiences and guided exploration activities.]]>
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