<![CDATA[Mathematics learning on triangle material in elementary schools still faces various challenges because geometric concepts are often abstract, and the learning process remains insufficiently interactive. These conditions affect students’ conceptual understanding and engagement during the learning process. Therefore, instructional media capable of presenting geometric concepts in a concrete and interactive manner are needed. This study aimed to develop GeoGebra-based learning media on triangle topics using the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). The novelty of this study lies in the integration of GeoGebra with a Deep Learning approach that emphasizes concept exploration, active student engagement, and the development of critical and creative thinking skills through the real-time manipulation of geometric objects objects. The research subjects consisted of 21 fifth-grade elementary school students. The validation process involved two media experts and two subject-matter experts. Data were collected through questionnaires, observations, and documentation, while data analysis employed descriptive percentage analysis. The findings revealed that the media expert validation score reached 88% and the material expert validation score reached 83%, both of which were categorized as highly valid. In addition, student responses reached 91%, indicating that the learning media were highly practical. These findings demonstrate that the developed learning media are feasible for supporting more interactive, visual, and meaningful mathematics learning on triangle material in elementary schools.]]>
