whiteboard interactive. Language teaching mode , on the one hand through an extensive literature review , review the classic model of modern teaching and learning theory and teaching at home and abroad , to build new or retrofit existing teaching model , verify its validity by experimental school teachers use hand By investigating the classic case and the teaching experience of the experimental school teachers , based on these experiences, summarize and generalize , enhance its theory , form a teaching mode , and return to the teaching for similar teaching objectives and teaching content, and test its feasibility. Sex. The process of pattern construction is shown in Figure 1. Chapter III Research Design. 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.