Buku Ajar Media Pembelajaran Matematika untuk Jenjang Sekolah Menengah

Development research using the 4D model, namely define, design, development, and disseminate. Product development in the form of a mathematics learning media textbook for secondary school level. The book will be used as a reference for the mathematics learning media course in semester V which is a mandatory course in the Mathematics Education Study Program. The development of this product is very important because there is no reference for mathematics learning media, especially for secondary school level. This book is equipped with how to make media, use of media, and is supported by videos. The results of the validation of this textbook obtained a value from the material field of 84%, the language field 85%, and the media field 88.3%, all validation results are included in the very valid category. At the practicality analysis stage, a percentage of 96.7% was obtained and included in the very practical category. It can be concluded that the textbook product developed is a valid and practical textbook.