Tujuan penelitian ini adalah untuk menghasilkan perangkat pembelajaran model inkuiri berbasis multirepresentasi yang layak dari segi kevalidan, kepraktisan dan keefektifan untuk melatihkan keterampilan berpikir kritis pada pelajaran fisika. Penelitian ini menggunakan model pengembangan 4-D. Perangkat pembelajaran yang telah dikembangkan, divalidasi oleh dua validator ahli pendidikan fisika dan sains. Perangkat pembelajaran yang divalidasi meliputi silabus, RPP, Buku Ajar Siswa, dan LKS. Setelah proses validasi dan revisi, perangkat pembelajaran diujicobakan untuk mengukur kepraktisan dan kefektifannya. Subyek uji coba adalah 30 siswa kelas X-MIPA 2, 3, dan 5 SMA Kemala Bhayangkari 1 Surabaya tahun ajaran 2018/2019. Hasil validasi perangkat a) Silabus dan RPP berkategori sangat valid, b) LKS dan BAS berkategori valid. Hasil kepraktisan berupa keterlaksanaan RPP dan aktifitas siswa berkategori baik. Hasil keefektifan dilihat dari peningkatan rata-rata keterampilan berpikir kritis siswa dari 30.11 menjadi 82.67 dengan N-gain 0.78% yang berkategori tinggi. Respon positif siswa terhadap perangkat pembelajaran sebesar 92.96%. Berdasarkan hasil kevalidan, kepraktisan, dan keefektifan perangkat tersebut menunjukkan bahwa perangkat pembelajaran fisika model inkuiri berbasis multirepresentasi layak digunakan dalam pembelajran untuk meningkatkan keterampilan berpikir kritis.

Kata Kunci: Model Inkuiri, Multirepresentasi, Keterampilan Berpikir Kritis, Valid, Praktis, Efektif

The purpose of this study was to produce a multi-representation based inquiry model learning set that was feasible in terms of validity, practicality and effectiveness to train critical thinking learning in physics lessons. This study uses a 4-D development model. Learning material that have been developed, validated by two validators of physics and science education experts. Validated learning tools include syllabus, lesson plans, student textbooks, and student worksheets. After the validation and revision process, the learning device is tested to measure its practicality and effectiveness. The subjects of the trial were 30 X-MIPA 2, 3, and 5 class students of SMA Kemala Bhayangkari 1 Surabaya in the academic year 2018/2019. Results of device validation a) Syllabus and learning plan are very valid categories, b) LKS and BAS are valid categories. The results of practicality in the form of implementation of lesson plans and student activities are categorized well. The results of effectiveness are seen from increasing the average critical thinking skills of students from 30.11 to 82.67 with N-gain of 0.78% categorized as high. Positive responses of students to learning devices amounted to 92.96%. Based on the validity, practicality, and effectiveness of the device, it was shown that physics learning devices based on multi-representation based inquiry models were suitable to be used in learning to improve critical thinking skills.

Keywords: Model Inquiry, Multi-representation, Critical, Valid, Practical, Effective Thinking Skills