<![CDATA[Study purpose. To develop a valid, practical, and effective Student Worksheet (LKPD) on swimming for Grade VI students at SD Negeri 45 Lubuklinggau to improve learning outcomes. Materials and Methods. The study employed a Research and Development (R&D) approach using the ADDIE model, comprising the stages of analysis, design, development, implementation, and evaluation. Research instruments included expert validation sheets, teacher and student response questionnaires, and learning outcome tests. Data were analyzed using descriptive quantitative and qualitative methods to assess the feasibility and effectiveness of the developed worksheet. Results. Validation showed that the worksheet was rated as "highly valid" by both subject matter and media experts. Field trials revealed positive responses from teachers and students, as well as a significant improvement in students' conceptual understanding and basic swimming skills. Consequently, the developed worksheet was deemed suitable for use in instruction. Teacher responses showed a 78% approval rate, while student responses showed 94%, placing it in the "highly practical" category. Furthermore, the worksheet's effectiveness was rated at 0.75, falling into the "high" category. The swimming worksheet proved to be valid, practical, and effective in enhancing the quality of student learning. This study contributes by providing innovative teaching materials that can serve as an alternative for developing physical education instruction in elementary schools. Conclusion. the swimming worksheet developed for Grade VI students at SD Negeri 45 Lubuklinggau demonstrated high effectiveness and is suitable for use in classroom learning activities.]]>
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