<![CDATA[This study aims to analyze the effectiveness of peer teaching-based cooperative learning models in improving cognitive learning outcomes of grade III students of SD Muhammadiyah 02 Bangkalan. Against the backdrop of low student learning achievement approaching the threshold of completion, the study used a Classroom Action Research (CAR) design with two cycles referring to the Kurt Lewin model. Participants involved 15 students, with data collected through formative tests, activity observations, and structured interviews. Quantitative descriptive analysis showed a significant increase: the average learning outcome score increased from 70 (Cycle I) to 88 (Cycle II), with the percentage of class completion increasing from 60% to 87%. Improvements were also seen in student discussion participation, clarity of material delivery through structured roles, and effective use of visual media. The conclusion of the study proves that the peer teaching model is able to optimize cognitive learning outcomes. Recommendations include strengthening interactive strategies, intensive mentoring to bridge curriculum gaps, and the application of adaptive models according to class needs. These findings serve as a reference for developing collaborative learning at the elementary level.]]>
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