Penelitian ini bertujuan untuk mengetahui kelayakan LKS, keterbacaan LKS, tingkat keterampilan proses sains, dan respon siswa terhadap LKS IPA Terpadu tipe connected materi zat aditif untuk siswa SMP kelas VIII yang dikembangkan. Penelitian ini merupakan penelitian R n D (research and development) dengan sasaran penelitian berupa LKS IPA Terpadu tipe connected materi Zat Aditif. Sumber data dalam penelitian ini adalah tim ahli yang meliputi dosen dan guru IPA sebagai validator, serta siswa kelas VIII-F MTs. Negeri Krian Sidoarjo sebagai subjek penelitian. Rancangan penelitian ini mengacu pada model pengembangan 4D oleh Tiagharadjan. Instrumen penelitian yang digunakan meliputi lembar validasi, Lembar Observasi keterampilan proses sains, posttest keterampilan proses sains serta lembar angket respon siswa. Pengumpulan data dilakukan menggunakan lembar angket validasi, Lembar Observasi keterampilan proses sains, posttest keterampilan proses sains serta lembar angket respon siswa Analisis data dilakukan secara deskriptif kualitatif. Hasil penelitian menunjukkan bahwa LKS IPA Terpadu tipe connected untuk melatih keterampilan proses sains pada materi zat aditif secara keseluruhan sangat layak digunakan, kelayakan LKS mendapatkan rerata skor validitas 0, 87 dan reliabilitas 85,85%, keterbacaan LKS mendapatkan persentase 93%, ketuntasan klasikal keterampilan proses sains 84%, dan persentase respon siswa 92%.

This study aims to know feasibility of students work Sheet, readability of students work sheet, the level of science process skill, and students’ responses against integrated science worksheet with the type connected especially in the subject of additive substance for VIII grade students. This in an R n D (research and development) type of research with the object of Integrated Nature Science worksheet with the type connected especially in the subject Additive Substance. The source of data in this research are an expert team which includes lecturers and Science teachers as validators and the student of 8th F grader of MTs.N Krian. The design of this study refers to the model 4 d development by Tiagharadjan. The instruments used in this research include validation sheet, process science skill observation sheet, process science skill test, and the polls of students’ responses. The data collection is conducted with validation poll sheet, science process skill of observation sheet, science process skill test and the polls of students’ responses. The writer uses descriptive-qualitative method in analyzing data. The result of research shows that validity is 0,87 percentage feasibility of student worksheet is 89,75%, percentage readibility of worksheet is 93%, clasical completeness of science process skill test with a percentage is 84%, and positive responses from the students toward student worksheet shown with a percentage is 92% on average Keywords: student worksheet, integrated science, and science procces skill. ?

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