<![CDATA[Penelitian pengembangan ini bertujuan mengembangkan buku digital matematika saintifik untuk materi persamaan kuadrat yang valid dan praktis. Penelitian ini menggunakan model pengembangan ADDIE yang meliputi 5 tahapan yaitu analysis, design, development, implementation, dan evaluation. Instrumen penelitian yang digunakan berupa lembar penilaian media oleh ahli media dan ahli materi untuk mengukur kevalidan serta angket respon siswa dan guru untuk mengukur kepraktisan buku digital matematika. Responden uji coba produk adalah 10 siswa kelas 8. Hasil penelitian menunjukkan bahwa produk memenuhi kriteria kevalidan berdasarkan penilaian oleh ahli materi dan ahli media. Produk memenuhi kriteria kepraktisan berdasarkan respon siswa yang dikategorikan kuat dan respon guru yang dikategorikan sangat kuat.Kata Kunci:pengembangan, buku digital matematika, pendekatan saintifik, ADDIEThis development research aims to develop valid and practical a digitalmathematics book scientific on the topic of quadratic equations. This research using the ADDIE development model, which includes 5 stages: analysis, design, development, implementation, and evaluation. The research instrument used is a form of media assessment sheets by media expert and material expert to measure the validity and students and teacher response questionnaires to measure the practicality of a digital mathematics book. Respondents for the product trial are 10 students of class VIII,1. The results showed that the product satisfies validity criteria based on the assessment by material expertand media expert. The product satisfies practicality criteria based on students response are categorized as strong and teacher response is categorized as very strong.Keywords:development, digital mathematics book, scientific approach, ADDIE]]>
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