what is elmo document camera. The professional development of teachers in the "Internet +" era has gradually moved from independence to integration. In the past, novice teachers have to go through a long period of time as expert teachers. In the information environment, everyone has different understandings of the professional development stage of teachers, including the five stages of ??learning imitation, attempting to use, perplexing, professional evolution, and innovative development?? represented by Yu Shengquan, represented by Wang Lu. The three stages of the learning experience stage, the practical reflection stage, and the research and innovation stage are the four-stage theory of ??understanding, application, integration, and innovation?? represented by Gu Xiaoqing. Combining these two kinds of references, we can see that the professional development of teachers after the introduction of information technology shows the following changes:. 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.