Tujuan dari penelitian ini adalah untuk mengetahui kelayakan Lembar Kerja Peserta Didik (LKPD) berbasis Contextual Teaching and Learning (CTL) pada materi larutan elektrolit dan nonelektrolit yang ditinjau dari validitas isi dan konstruk melalui hasil validasi oleh para ahli, kepraktisan melalui aktivitas peserta didik dan respon peserta didik, serta keefektifan melalui peningkatan penilaian berpikir kritis dan hasil belajar peserta didik. Jenis penelitian merupakan penelitian pengembangan model 4P dengan empat tahap yakni, pendefinisian, perancangan, pengembangan, dan penyebaran yang dibatasi pada tahap pengembangan. LKPD diuji cobakan kepada 12 peserta didik kelas XI SMAN 1 Cerme Gresik. Hasil penelitian menunjukkan LKPD yang dikembangkan valid ditinjau dari validitas isi mendapat persentase 79,68% serta validitas konstruk memperoleh persentase 83,96%. Kepraktisan ditinjau dari hasil observasi aktivitas peserta didik selama tahap uji coba terbatas LKPD dengan persentase 90,51% dan respon peserta didik terhadap masing-masing kriteria yakni kriteria isi 97,92%, kriteria penyajian 94,44%, dan kriteria kebahasaan 97,22%. Keefektifan ditinjau dari peningkatan hasil penilaian berpikir kritis melalui n-gain 100% mengalami peningkatan dengan kriteria tinggi serta hasil belajar peserta didik mengalami peningkatan sebesar 58,33% dengan kriteria sedang dan 41,67% dengan kriteria tinggi.
Kata kunci: LKPD, Keterampilan Berpikir Kritis, Kelayakan.
The purpose of this research is determine the feasibility of student worksheets with CTL based in electrolyte and nonelectrolyte solution material that are viewed from validity contains and construct through the result of validation by experts, practicality through student activities and student response, and effectiveness through increasing result critical thinking assessment and student learning outcomes. This type of research is 4P model development research with four stages, define, design,develop, and disseminate which is confined only to develop stage. Student worksheets was tested on 12 students of 11th grade of SMA Negeri 1 Cerme Gresik. The results showed that validation developed worksheets viewed from content validity obtained a percentage of 79,68% and construct validity obtained a percentage of 83,96%. Practicality in terms of observations of the activities of students during the testing phase of the student worksheets with a percentage of 90,51% and responses of students to each criterion the content criteria of 97,92%, presentation criteria 94,44%, and language criteria 97,22%. The effectiveness seen from the increase in critical thinking skills assessment result through 100% n-gain score has increased with high criteria and student learning outcomes have increased by 58,33% with moderate criteria and 41,67% with high criteria.
Keywords:Student worksheets, Critical thinking skill, feasibility.