white board technology. The cornerstone of the school model , the teaching model must be applied to the teaching practice ??` have the necessity of its existence , and only through the test of teaching practice can be continuously improved. Thus , while the study of teaching model , but also to the actual teaching activities , research teaching mode whether it is conducive to improve the efficiency and effectiveness of English teaching , which is our research and build mode where the purpose , but also verify mode is valid Whether it is worth promoting the basic approach.. 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.