<![CDATA[Penelitian ini bertujuan untuk: a) mendeskripsikan desain bahan ajar Matematika Ekonomi berbasis vlog; b) mengukur tingkat kevalidan bahan ajar Matematika Ekonomi berbasis vlog menurut para ahli; c) mengukur tingkat kepraktisan bahan ajar Matematika Ekonomi berbasis vlog menurut mahasiswa pengguna; dan d) mengetahui tingkat efektivitas bahan ajar Matematika Ekonomi berbasis vlog terhadap kemampuan penguasaaan konsep dan komunikasi matematis mahasiswa pengguna. Metode penelitian ini menggunakan mixed-method dengan pendekatan penelitian dan pengembangan. Bahan ajar Matematika Ekonomi berbasis vlog dikembangkan dengan model pngembangan 4D (Define, Design, Develop dan Disseminate). Subjek dari penelitian ini adalah mahasiswa semester II jurusan Manajemen Fakultas Ekonomi dan Bisnis Universitas Bina Bangsa yang sedang mengambil mata kuliah Matematika Ekonomi. Hasil uji kevalidan dari para ahli yang terdiri dari ahli materi, ahli media dan ahli bahasa diperoleh bahwa bahan ajar Matematika Ekonomi berbasis vlog termasuk pada kriteria kelayakan sangat valid. Uji kepraktisan oleh mahasiswa pengguna bahan ajar diperoleh bahwa bahan ajar Matematika Ekonomi berbasis vlog termasuk dalam kriteria sangat praktis. Adapun uji efektivitas bahan ajar Matematika Ekonomi berbasis vlog efektif dalam meningkatkan kemampuan penguasaan konsep dan komunikasi matematis mahasiswa.The purpose of this study is to: a) describe the design of vlog-based Mathematics Economics teaching materials; b) measure the validity of vlog-based Mathematics Economics teaching materials according to experts; c) measure the practicality of vlog-based Mathematics Economics teaching materials according to student users; and d) measure the effectiveness of vlog-based Mathematics Economic teaching materials on the ability to mastery of mathematical concepts and mathematical communication of user students. This research method uses mixed-method with a research and development approach. Vlog-based Mathematics Economic teaching materials are developed using the 4D development model (Define, Ddesign, Develop and Disseminate). The subjects of this study is the 2nd semester students majoring in Management, Faculty of Economics and Business, University of Bina Bangsa who were currently taking Mathematics Economics courses. Validation test results from experts consisting of material experts, media experts and linguists obtained that the vlog-based Mathematics Economics teaching materials are very valid. Practicality test by students who use teaching materials is obtained that the vlog-based Mathematics Economics teaching material is very practical criteria. The effectiveness test of Vlog-based Mathematics Economics teaching materials is effective in improving students' mathematical concepts and mastery ability. ]]>
