Digital learning materials. Digital learning resources refer to information materials that can be digitally processed and operated under multimedia computer or network environment and used for teaching and learning activities, including e-books, online courses, educational applications, virtual laboratories, databases, etc. The characteristics of these digital learning resources are that they can be spread and shared through the network, and have the advantages of interactivity, personalization, customization and renewability, which can better meet students' learning needs and learning methods. The application of digital learning resources has been widely promoted in the field of education, providing students with more abundant and flexible learning methods.