Penelitian ini bertujuan mendeskripsikan kelayakan lembar kegiatan siswa (LKS) berbasis discovery learning pada materi Hukum Newton untuk meningkatkan keterampilan proses sains siswa. Model pengembangan yang digunakan yaitu Research and Development (R&D) meliputi tahapan potensi dan masalah, pengumpulan data, desain produk, validasi desain, revisi desain dan uji coba terbatas. Kelayakan LKS berbasis discovery learning dapat ditinjau dari 3 aspek yaitu validitas, kepraktisan dan efektivitas. Hasil validasi menunjukkan syarat didaktik sebesar 82,94%, syarat konstruksi sebesar 91,21% dan syarat teknis sebesar 86,11%. Rata-rata dari penilaian syarat LKS dinyatakan sangat layak. Kelayakan ditinjau dari keprakisan menunjukkan hasil pengamatan aktivitas siswa sebesar 81,62 % dinyatakan sangat layak dan respon siswa sebesar 89,47 % dinyatakan sangat layak. Kelayakan ditinjau dari efektivtas menunjukkan hasil peningkatan keterampilan proses sains dengan nilai N-Gain sebesar 0,83 kategori tinggi. Peningkatan tiap siswa sebesar 15,7 % kategori sedang dan 84,3 % kategori tinggi. Hasil penelitian menujukkan bahwa LKS berbasis discovery learning pada materi Hukum Newton dinyatakan layak digunakan berdasarkan aspek kelayakan yaitu validitas, kepraktisan dan efektivitas.
Kata Kunci: Pengembangan LKS, discovery learning, keterampilan proses sains.
This study aims to describe the feasibility of student activity sheets (LKS) based on discovery learning in Newton's Law material to improve students' science process skills. The development model used is Research and Development (R & D) covering potential and problem stages, data collection, product design, design validation, design revisions and limited trials. The feasibility of LKS based on discovery learning can be viewed from 3 aspects, namely validity, practicality and effectiveness. Validation results showed didactic requirements of 82.94%, construction requirements of 91.21% and technical requirements of 86.11%. The average assessment of LKS requirements is stated to be very feasible. Feasibility in terms of practically shows the results of student activities at 81.62% are stated to be very feasible and student responses of 89.47% are stated to be very feasible. Feasibility in terms of effectiveness shows the results of improving science process skills with N-Gain values of 0.83 high categories. The increase in each student was 15.7% in the medium category and 84.3% in the high category. The results of the study show that LKS based on discovery learning in Newton's Law material was declared feasible to use based on feasibility aspects, namely validity, practicality and effectiveness.
Keywords: Development of LKS, discovery learning, science process skills.