what are document cameras. The teaching guidance and evaluation platform of the church began to be constructed in 2010, and the way in which teachers collaborate to conduct lectures and evaluate classes is innovated. The lecturer takes the mobile terminal into the classroom to carry out classroom observation and evaluation, and uses the mobile terminal to record the interaction process between the teacher and the student and the operation process of the student in real time, and collects the ??evidence?? required for evaluating and diagnosing the teacher's teaching. The platform can instantly summarize the data collected by each class teacher so that there can be a ??evidence?? review after class. (2) Conduct teacher communication based on regional education cloud and construct a new way for teachers to communicate online. Since 2012, the district has built a unified cloud communication technology-based teacher communication cloud platform for teachers, and has innovated the regional teacher communication method, which has realized the teachers' email, SMS, instant messaging, video conferencing, live video and on-demand broadcasting. The unification of communication tools has realized the unification of various communication applications such as remote video teaching and research, online training, and educational resource sharing.. 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.