<![CDATA[This study emerged due to the significant need to improve students' critical thinking skills and self-concept. The purpose of this study was to analyze the effectiveness of the Reading, Mind Mapping, and Sharing (RMS) learning model assisted by Desmos in improving critical thinking skills and self-concept. The research method used a quasi-experiment with a non-equivalent control group design. The research sample consisted of two classes randomly selected from a public junior high school in Purwakarta. The main instruments were a valid and reliable critical thinking skills test and a questionnaire to measure self-concept. The results showed that students who participated in Desmos-assisted RMS learning obtained an average posttest score of 45.6 for critical thinking skills, which was higher than the conventional class score of 13.3. The N-Gain value of the Desmos-assisted RMS class was 0.21 (moderate category), while the conventional class was 0.14. The t-test showed a value of (2.741) ≥ (1.692), indicating a significant increase in critical thinking skills, with better results than conventional learning. In addition, the self-concept of students in the RMS class was in the moderate category with a range of 2.79 ≤ X < 3.03 and showed a positive response. Based on these findings, the Desmos-assisted RMS model can be one option for creating more active learning and supporting the development of students' critical thinking.]]>
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