VALIDITAS PERANGKAT PEMBELAJARAN FISIKA MODEL PREDICT-OBSERVE-EXPLAIN (POE) UNTUK MENINGKATKAN KETERAMPILAN BERPIKIR KRITIS PESERTA DIDIK

THE VALIDITY OF PHYSICS LEARNING DEVICES USING THE PREDICT-OBSERVE-EXPLAIN (POE) MODEL TO IMPROVE STUDENT CRITICAL THINKING

Perangkat pembelajaran merupakan suatu hal yang harus disiapkan oleh guru sebelum melaksanakan pembelajaran. Sebelum perangkat pembelajaran layak digunakan, maka perlu dilakukan validasi. Tujuan penelitian ini adalah mendeskripsikan validitas perangkat pembelajaran fisika model Predict-Observe-Explain (POE) untuk meningkatkan keterampilan berpikir kritis peserta didik. Perangkat pembelajaran yang dideskripsikan diantaranya adalah silabus, RPP, handout, LKPD, dan lembar evaluasi. Materi yang digunakan adalah optik geometri sub pemantulan dan pembiasan cahaya. Penelitian dilakukan di Jurusan Fisika FMIPA Universitas Negeri Surabaya pada semester genap 2019/2020. Teknik analisis data dianalisis secara dekriptif-kuantitatif dengan menggambarkan dan memaparkan penilaian dalam persentase. Kelayakan perangkat pembelajaran ditinjau dari aspek validitas dan reliabilitas. Instrumen pengumpulan data menggunakan lembar validasi yang dinilai oleh dua dosen ahli dari jurusan Fisika UNESA. Data lembar validasi dianalisis menggunakan skala Likert dan reliabilitas dianalisis menggunakan rumus percentage of agreement. Hasil penelitian menunjukkan persentase validitas silabus sebesar 87,50% dengan kategori sangat valid, persentase validitas RPP sebesar 93,13% dengan kategori sangat valid, validitas handout sebesar 78,13% dengan kategori valid, validitas LKPD sebesar 89,58% dengan kategori sangat valid, dan validitas lembar evaluasi sebesar 91,67% dengan kategori sangat valid. Reliabilitas perangkat pembelajaran pada kriteria reliabel dengan persentase reliabilitas silabus sebesar 92,06%, RPP sebesar 95%, handout 95%, LKPD 92,80%, dan lembar evaluasi 90,48%. Berdasarkan hasil analisis data yang diperoleh dapat dinyatakan bahwa perangkat pembelajaran yang dikembangkan layak digunakan dengan kriteria valid dan reliabel.

Kata kunci: Validitas, perangkat pembelajaran, keterampilan berpikir kritis, model POE

Learning devices must be prepared by a teacher before starting a lesson. Before learning devices are suitable to use, it needs to be validated. The purpose of this study was to describe the validity of Physics learning devices using the Predict-Observe-Explain (POE) model to improve student critical thinking. Type of learning devices was syllabus, lesson plan, handout, student worksheet, and evaluation sheet and the material was geometry optics, a section of reflection, and refraction. Moreover, this study was conducted during the even semester of 2019/2020 in the Physics Department, FMIPA UNESA. The data were analyzed descriptive-qualitatively by drawing and explaining the record score in the presentation. The validation of the learning device was reviewed from the validity and reliability aspect. The data collection’s instrument was the validation sheet evaluated by two expert lecturers from the Physic Education Department of the State University of Surabaya. The validation sheet was analyzed using a Likert scale and the reliability sheet was analyzed using the precentage of agreement formula. The finding shows the percentage of syllabus validity was 87.50%, the lesson plan was 93.13%, the student worksheet was 89.5%, and the evaluation sheet was 91.67%, where all of them were categorized as incredibly valid, whereas the handout is 78.13% which is valid in common. Additionally, the percentage of reliability learning devices was 92.06% for syllabus, 95% for the lesson plan, 95% for a handout, 92.80% for student worksheet, and 90.48% for evaluation sheet, where all of them were precisely reliable. Therefore, the developed learning device was appropriate to use due to valid and reliable criteria.

Keywords: Validity, learning device, critical thinking skill, POE model