how to work document camera. The role of practical knowledge generation space provides support for the generation, sharing and recording of teachers' practical knowledge. The teacher's entire preparation and exchange process and the material materials in the preparation process and the different versions of the lesson plans and courseware are all recorded in the network teaching space. In the process of teaching implementation, the network learning space uses the recording and broadcasting function to record the teaching process all the time. All teachers can make real-time and non-real-time comments. On the basis of the teaching implementation, the teachers carry out the deep reflection of the teaching and the problems in the teaching. Conduct research, find solutions, and generate new practical knowledge. In this way, in the network learning space, a case package consisting of multi-version, continuous improvement of teaching design, courseware, classroom recording, teaching reflection, problem discussion and solution strategy is organized. This case package records the teacher's teaching philosophy, methods, organizational strategies and problem-solving strategies. It is a manifestation of the teacher's practical knowledge and is easy for all teachers in the district to learn from.. Interactive Document Camera is a completely new concept design and mobile visualizer. The touch capability on IQTouch and IQBoard, IQView E3511 Document Camera can be freely used for presentations anywhere in or out of the classroom or office.