ABSTRAK Penelitian ini bertujuan mengetahui kelayakan bahan ajar berbentuk Lembar Kerja Siswa Berbasis Keterampilan Proses Sains pada materi Pencemaran Lingkungan, keterbacaan bahan ajar dan respon siswa. Penelitian dilaksanakan di SMP Negeri 3 Kamal di kelas VII A tahun ajaran 2017/2018. Model Pengembangan menggunakan model ADDIE terdiri dari lima tahapan yaitu Analysis, Design, Development, Implementation, and Evaluation. Tahapan terakhir dari pengembangan ADDIE yaitu tahap Evaluation tidak dilakukan karena keterbatasan waktu. Bahan ajar berbentuk Lembar Kerja Siswa Berbasis Keterampilan Proses Sains yang dikembangkan dinilai dari kelayakan bahan ajar, kelayakan materi, keterbacaan dan respon siswa. Hasil rata-rata penilaian uji kelayakan adalah validitas 82.22%. Pada nilai kelayakan bahan ajar adalah 81.11% dengan kriteria sangat valid dan penilaian kelayakan materi adalah 82.50% dengan kriteria sangat valid. Hasil rata-rata penilaian keterbacaan bahan ajar sebesar 76.00% dengan kriteria sangat baik dan rata-rata penilaian respon siswa sebesar 75.00% dengan kriteria sangat baik. Bahan ajar berbentuk Lembar Kerja Siswa Berbasis Keterampilan Proses Sains pada materi Pencemaran Lingkungan layak digunakan dengan revisi kecil. Kata Kunci: Bahan Ajar, Lembar Kerja Siswa, Keterampilan Proses Sains

ABSTRACT The research aims to investigated about the validity of instructional learning worksheet based on science skills process on enviromental pollution topic, readable of instructional learning and student responses. This research applied at SMP Negeri 3 Kamal in class VII A academic years 2017/2018. The development of this research used ADDIE consists of five stage of Analysis, Design, Development, Implementation, and Evaluation. The last stage of ADDIE development is the evaluation stage was not done because of time constraints. Instructional learning based on science skills process that development was valued from the feasibility of instructional learning, readable of instructional learning and student responses. The average result of feasibility test in this research was 82.22%. For the feasibility of instructional learning was 81.11% with valid category and 82.50% for the feasibility of the subject matters with valid category. The average result of readable of instructional learning is 76.00% with good category and the student responses was 75.00% with good category. Teaching instrumental of student worksheets based on science skills process in the enviroment pollution topic were validity for use with a little revision. Keywords: instructional learning, Student Worksheet, Sains Skill Process

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