Penelitian ini bertujuan untuk mengetahui bagaimana kelayakan media pembelajaran big book ditinjau dari validasi ahli media, ahli materi,dan ahli bahasa, selain itu, penelitian ini dilakukan untuk mengetahui bagaimana respon guru dan siswa terhadap kemenarikan media big book yang ditinjau dari angket respon guru dan siswa. penelitian ini merupakan penelitian dan pengembangan (research and development), adapun prosedur penelitian ini menggunakan model pengembangan addie yang terdiri atas 5 tahapan yaitu, analysis (analisis), design (desain), development (pengembangan), implementation (implementasi), dan evaluation (evaluasi). hasil perhitungan kelayakan media big book ditinjau dari validasi media dengan persentasenya sebesar 93%, validasi bahasa persentasenya sebesar 80% dan validasi materi 87%. kemenarikan media big book diperoleh persentase pada uji coba terbatas sebesar 95% dan uji coba pemakaian sebesar 96%. berdasarkan hasil validasi ahli materi, ahli media, dan ahli bahasa,serta respon guru, respon siswa pada uji coba terbatas dan uji coba pemakaian, maka media pembelajaran big book dinyatakan layak dan menarik digunakan dalam proses pembelajaran. kata kunci: penelitian dan pengembangan, media pembelajaran, big book

This research aims to describe the feasibility of big books as learning media in terms of expert validation on media, material, and linguists. this research was also conducted to investigate how teachers and students respond based on the questionnaire result. the research design was research and development (r&d), which consists of five stages of the addie development model: analysis, design, development, implementation, and evaluation. the results showed that the feasibility of big book media was 93%, language validation was 80%, and material validation was 87%. the attractiveness of big book media obtained a percentage in a limited trial was 95%, and in a field trial was 96%. based on the validation results: of material experts, media experts, and linguists, as well as teacher and students' responses on limited trials and usage trials. the big book as learning media was declared feasible and interesting to use in the learning process. keywords: research and development, learning media, big book