Penelitian pengembangan ini bertujuan untuk mendeskripsikan kelayakan LKPD berorientasi pendekatan Contextual Teaching and Learning agar keterampilan pemecahan masalah peserta didik pada materi koloid meningkat. Data penelitian bersumber dari dosen ahli dan guru kimia berupa penilaian LKPD, serta 15 siswa kelas XI MIA SMA Negeri 1 Wates berupa respon siswa dan pengamatan aktivitas siswa. Metode yang digunakan adalah penelitian pengembangan model 4D yang hanya dibatasi pada tahap develop. Hasil penelitian menunjukkan LKPD yang dikembangkan valid ditinjau dari validitas isi yang menunjukkan hasil sebesar 77,60% serta validitas konstruk sebesar 79,29%. Kepraktisan ditinjau dari respon siswa yaitu kriteria isi sebesar 91,75%, kriteria bahasa 93,50%, kriteria penyajian 97,83%, kriteria kegrafikan sebesar 90%, kriteria pendekatan CTL sebesar 92%, kriteria keterampilan memecahkan masalah sebesar 85,67% yang didukung hasil observasi aktivitas peserta didik yang relevan selama tahap uji coba LKPD di setiap pertemuan memperoleh interpretasi sangat baik. Keefektifan ditinjau berdasarkan peningkatan keterampilan peserta didik dalam memecahkan masalah melalui skor gain 40% dengan kriteria sedang dan 60% dengan kriteria tinggi.

Kata kunci: LKPD, pendekatan CTL, keterampilan memecahkan masalah

This development research aims to describe the feasibility of LKPD oriented to contextual teaching and learning so that students problem solving skills in colloidal material increase. The research data is sourced from expert lecturers and chemistry teachers about the LKPD, 15 students in SMA 1 Wates in students responses to LKPD and student activities. The method used is a 4D model development research that only addresses the development stage. The results showed that the developed LKPD was valid in terms of content validity which showed results of 77.60% and construct validity of 79.29%. Practicality in terms of student responses, namely the content criteria of 91.75%, language criteria 93.50%, presentation criteria 97.83%, grammatical criteria of 90%, CTL application criteria of 92%, problem solving criteria of 85.67% supported by the observations of relevant students during the LKPD trials at each meeting received a very good interpretation. Effectiveness is reviewed based on the improvement of students skills in problem solving through scores, get 40% with medium criteria and 60% with high criteria..

Keywords: Student worksheet, CTL approach, problem solving skill.