VALIDITAS PENGEMBANGAN LKS BERBASIS CTL PADA MATERI EKOSISTEM UNTUK MELATIHKAN KETERAMPILAN PROSES SAINS SISWA KELAS X SMA 

THE VALIDITY OF DEVELOPING CTL BASED OF STUDENT WORKSHEET ON THE TOPIC OF ECOSYSTEM TO TRAIN THE SCIENCE PROCESS SKILLS OF SENIOR HIGH SCHOOL STUDENTS FOR CLASS X

Karakteristik materi ekosistem bersifat kontekstual. Untuk memfasilitasi pembelajaran kontekstual, diperlukan Lembar Kegiatan Siswa (LKS) dengan pendekatan Contextual Teaching and Learning (CTL). LKS berbasis CTL memberi kesempatan siswa melakukan kegiatan berupa keterampilan proses dalam aspek kerja ilmiah. Tujuan dari penelitian ini adalah mendeskripsikan validitas LKS berbasis CTL pada materi ekosistem untuk melatih keterampilan proses sains. Penelitian ini adalah penelitian pengembangan dengan mengikuti model 4-D yaitu define, design, develop dan disseminate tanpa dilakukan tahap penyebaran. LKS yang dikembangkan diuji tingkat validitasnya oleh dua validator yaitu dua dosen jurusan Biologi Universitas Negeri Surabaya menggunakan lembar instrumen validasi. Beberapa kriteria yang diuji tingkat kelayakannya meliputi kriteria kelayakan isi, penyajian, dan bahasa. Berdasarkan uji validasi LKS yang dikembangkan dinyatakan sangat valid dengan pemerolehan nilai  rata-rata sebesar 3,61.   

Kata Kunci: Validitas LKS, CTL, Keterampilan Proses Sains, Ekosistem.

Ecosystem is one of the material that contextual. To facilitate contextual learning, the Student worksheet (LKS) based on Contextual Teaching and Learning (CTL) is needed. CTL-based student worksheet gives students the opportunity to do activities in the form of process skills in aspects of scientific work. This research aims to describe the validity of CTL-based worksheet on ecosystem material to train students' science process skills. This type of research is development by following the 4-D model, which is define, design, develop and disseminate without disseminate stage. The Student worksheet developed were tested for validity by two validators, namely two lecturers majoring in Biology, Surabaya State University using a validation instrument sheet. Some aspects that were tested for their feasibility level included aspects of content, presentation, and language. Based on the validation test the worksheet developed was included in the highly valid category with an average score of 3.61.

Keywords: Student Worksheets Validity, Contextual Teaching and Learning, science process skills, Ecosystem.