<![CDATA[This study aims to develop an ethnomatics-based Student Worksheet (LKPD) using the Realistic Mathematics Education (RME) model to improve student learning outcomes in flat geometry material. The background of this study is the low student learning outcomes caused by the lack of use of contextual and interesting learning media. The research method used is Research and Development (R&D) with the ADDIE development model which includes the stages of Analysis, Design, Development, Implementation, and Evaluation. The subjects of this study were 25 fourth-grade students of SDN 060823. The instruments used included expert validation sheets, teacher and student response questionnaires, and learning outcome tests (pretest and posttest). The N-Gain result was 0.56 with a moderate category (good). The teacher and student responses to the LKPD were also very positive, with a very practical category. The increase in student learning outcomes was indicated by an average pretest score of 67.48 and a posttest of 87.84. The N- Gain calculation showed an average score of 0.56 which was included in the moderate category. Based on the research results, it can be concluded that LKPD based on ethnomatics with the RME approach is feasible to use, practical, and effective in improving student learning outcomes. The integration of local cultural values in mathematics learning has been proven to facilitate students' understanding of the material in a more contextual and meaningful way.]]>
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