Penelitian ini bertujuan untuk mengetahui kelayakan, keterbacaan, dan respons siswa terhadap Lembaran kerja siswa. Menggunakan model pengembangan 4D meliputi Define, Design, Develop, Desseminate dan keterampilan Generik sains. Berdasarkan hasil penelitian diperoleh nilai rata-rata kelayakan media dari uji valiadsi sebesar 0,88% dinyatakan layak digunakan tanpa revis, dan uji reliabilitas sebesar 93% dinyatakan sangat baik, rata-rata kelayakan materi dari hasil uji validitas sebesar 0,83% dinyatakan layak digunakan tanpa revisi dan uji reliabilitas sebesar 91% dinyatakan sangat baik, keterbacaan sebesar 93,35% dinyatakan sangat baik, respons siswa sebesar 87,91% dinyatakan baik. Disimpulkan bahwa pengembanagan Lembar kerja siswa berbasis keterampilan generik sains melalui praktikum IPA layak digunakan sebagai bahan ajar dalam proses pembelajaran Kata Kunci: Cahaya dan Optik, Keterampilan Generik sains. Praktikum IPA, Lembar kerja siswa.

This study aims to determine the feasibility, readability, and response of students to student work sheets. This research is using the 4D development includes Define, Design, Develop, Desseminate and Generic science skills.. Based on the results of the study obtained an average value of the feasibility of the media from the validity test Was 0.88% declared feasible to use without revision, and the reliability test Was 93% declared very good, the average material worthiness of the results of the validity test was 0,83% were declared feasible to be used without revision and the reliability test Was 91% declared very good, a readability was 93.35% stated very good, student responses was 87.91% declared good. It was concluded that the development of student worksheets based on generic science skills through science labs was appropriate to be used as teaching material in the learning process. Keywords: Generic Science skills, Student worksheets.

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