Teachers' digital terminals include digital platforms, digital blackboards and other digital terminals used by teachers in teaching preparation and teaching process. According to the public information about the inquiry, the teacher's digital terminal should not only have the same multimedia analysis and wireless connection functions as the student's digital terminal, but also include the following functions: making multimedia courseware, that is, obtaining the elements of making multimedia courseware through the connection with the education and teaching service platform, and then typesetting locally at the teacher's terminal to generate vivid multimedia courseware to prepare for classroom teaching. Teaching interaction, that is, through the interconnection with students' terminals, realizes point-to-point or point-to-multipoint questioning with students in real time during the teaching process.