optical interactive whiteboard. The key factor of information. The WOE board resource library system adopts a hierarchical presentation manner of information resources in the design to facilitate user browsing. At the same time, the system adopts an efficient search strategy in the design, providing multiple query methods based on user role-based search, precise query, fuzzy query, subject-based curriculum search and knowledge-based search.. The IQAio GR519 is an upgraded lightweight version based on the original IQAio GR511. The original dual-cavity structure was changed to a bottom-edge structure, so that the minimalist design accommodates modern classrooms and conference rooms. With one IQProjector V2 and one IQView E3821, you can achieve flexible and intelligent classroom.