Mathematics smart books based on QR Code as a digital learning media material limit function

Based on research data conducted by Cambridge International through the Global Education Census, it is stated that 67% of Indonesian students use smart phones in class, while 90% of teachers in Indonesia still use blackboards when teaching. Through this research, produced a learning medium, namely Smart Book based on QR Code, which allows students to more easily access digital learning materials so that they can adapt to the habits of students in class. The type of research used is Research Development with a 3D model (Design, Develop, and Deliver) and two data analysis techniques, namely: validity data analysis and student response data analysis. The procedure for making QR Code-Based Math Smart Books relies on the functions of several technologies, namely: QR Code, QR Scanner, and Google Drive. After the manufacturing process, media validation and material validation were carried out. The results of media and material validation showed the validity level of 3.83 and 4 which were in the very feasible category. Based on the results of the trial with 6 respondents, the students responded well. Therefore, based on validation and trials, it can be concluded that the Smart Mathematics Book media can overcome student learning gaps where students use smartphones more often in class.