<![CDATA[This study aims to (1) determine the feasibility of discovery learning-based physics worksheets on vibration, waves, and light materials, (2) determine the improvement in student learning outcomes, and (3) determine the improvement in scientific attitudes of eighth-grade students of Muhammadiyah Jajaran Baru II Middle School. This study uses the Research and Development (R&D) method with the ADDIE model. The subjects of the study were eighth-grade students of Muhammadiyah Jajaran Baru II Middle School. Data were collected through validation sheets, pretest-posttest questions, and scientific attitude questionnaires, then analyzed using product validation analysis, N-Gain, and percentage. The results showed that the worksheet obtained a validation score of 44 (Very Good) from material experts, 32 (Good) from media experts, and 35 (Very Good) from language experts. The average learning outcomes increased from 40.00 to 66.75 with an N-Gain value of 0.445 (moderate category). Students' scientific attitudes also increased at each meeting, from 43.45% to 57.79%, and reached 81.58%. Thus, the developed discovery learning-based physics LKPD is suitable for use and effective in improving students' learning outcomes and scientific attitudes.]]>
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