Penelitian ini bertujuan untuk mengetahui kelayakan lembar kegiatan peserta didik (LKPD) berbasis soft skills pada materi pokok koloid ditinjau dari validitas isi dan konstruk melalui hasil validasi para ahli, kepraktisan melalui aktivitas peserta didik dan respon peserta didik terhadap LKPD serta keefektifan melalui hasil belajar peserta didik dan penilaian soft skill peserta didik. Jenis penelitian ini merupakan penelitian pengembangan model 4-P dengan tahapannya yaitu, pendefinisian, perancangan, pengembangan, dan penyebaran, yang dibatasi hanya sampai pada tahap pengembangan. Uji coba terbatas dilakukan terhadap 15 peserta didik kelas XI IPA 6 SMA Negeri 1 Bangsal Mojokerto. Hasil penelitian menunjukkan LKPD yang dikembangkan valid ditinjau dari validitas isi memperoleh persentase sebesar 91,76% serta validitas konstruk memperoleh persentase sebesar 92,49%. Praktis ditinjau dari hasil respon peserta didik terhadap masing-masing kriteria yaitu kriteria isi sebesar 95,56%, kriteria penyajian sebesar 98,10%, kiteria bahasa sebesar 96,67% dan kriteria Soft Skill sebesar 97,16% dan didukung hasil observasi aktivitas peserta didik memperoleh persentase sebesar 92,27%. Keefektifan yang ditinjau dari hasil belajar peserta didik memperoleh nilai ≥ 70 dengan ketuntasan klasikal sebesar 100% dan penilaian soft skill peserta didik memperoleh persentase sebesar 92,41% sehingga peserta didik memiliki kemampuan dalam berwirausaha.
The purpose of the research is determine the feasibility of the student worksheet based on soft skills on the subject matter of colloids in terms of content validity and construct through the results of expert validation, practicality through student activities and student responses and effectiveness through student learning outcomes and the assessment of students' soft skills. This type of research is a 4-P model development research with stages, namely, defining, designing, developing, and dessiminate, which is limited to the development stage. A limited trial was conducted to 15 students of 11th grade in SMA Negeri 1 Bangsal Mojokerto. The results showed that the LKPD developed valid in terms of content validity obtained a percentage of 91.76% and construct validity obtained a percentage of 92.49%. Practical in terms of the results of student responses to each criterion, namely the content criteria of 95.56%, presentation criteria of 98.10%, language criteria of 96.67% and soft skill criteria of 97.16% and supported by observations of activities students get a percentage of 92.27%. Effectiveness in terms of student learning outcomes obtained a value of ≥ 70 with classical completeness of 100% and the assessment of soft skills of students gained a percentage of 92.41% so that students have the ability to entrepreneurship.