摘要：This research is based on the low ability of students’ mathematical understanding with the discovery of the problems of the mid-school linear system with two variable the lack of raw materials used by teachers and students in the learning process and there is no technology-based teaching material yet such as digital teaching materials developed. The development of teaching materials currently carried out is still conventional like a book, the using of a book for this material cannot facilitate the ability of mathematical understanding, one of the solution is developing a valid and practical digital teaching materials in the form of digital module with using 3D Page flip Professional based on the ability of mathematical understanding on the material linear system with two variable that are valid and practical. Furthermore, this research is the development research using ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). To collect the data, techniques are carried out through interview, test, validation sheet, and practicality sheet. Then, the validity test of this digital teaching material is done by 5 validators and the practicality test is done by 9 practitioners. The results of this research showed the using of digital teaching materials using 3D Page flip Professional are valid and practical. Further, based on the validation with percentage 92% and the practicality with percentage 91.67%. It short, the digital teaching material is useable in the learning process on the material linear system with two variable and it is easy to use for the students.
关键词：Digital 3D Book; Mathematical Understanding; Linear System
