<![CDATA[Science learning at SDN 105387 Sei Karang still faces challenges in the form of the use of uninteresting conventional worksheets and teacher-centered learning methods, resulting in low student motivation and learning outcomes. The objective of the research was to develop a Discovery Learning-based worksheet for Live Worksheet-assisted science learning that is feasible, practical, and effective for grade five elementary school students. The research used a Research and Development (R&D) method with the ADDIE model, encompassing the stages of Analysis, Design, Development, Implementation, and Evaluation. The research subjects were 20 fifth-grade students of SDN 105387 Sei Karang with the material “Bagaimana Bernapas Membantuku Melakukan Aktivitas Sehari-hari?” The research instruments consisted of validation sheets from material experts, design experts, education practitioners, student response questionnaires, and pretest and posttest questions. Data were analyzed using quantitative descriptive techniques with a Likert scale of 1-5. The results showed that LKPD had very good feasibility based on validation from material experts with a score of 4.36 (87.2%), design experts 4.25 (85%), and education practitioners 4.45 (89%) with the category “Very Feasible.” The effectiveness of LKPD was proven by the increase in student learning outcomes with an average Pretest of 65.50 (40% completion) increasing to Post-test 84.25 (90% completion), or an increase of 18.75 points (28.6%). Student responses to LKPD were very positive with a score of 4.52 (90.4%) in the “Very Practical” category. It can be concluded that the Discovery Learning-based student worksheet (LKPD) in 1PAS learning, assisted by Live Worksheets, has been successfully developed with excellent quality and meets the criteria of being feasible, practical, and effective for improving the learning outcomes of fifth-grade elementary school students.]]>
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