viewsonic interactive display 55. knowledge. According to whether tacit knowledge is easy to express , it can be divided into two types that are easy to express and difficult to express. What is studied here is the user's need for tacit knowledge that is easy to express. These resources are mainly emotional knowledge of predecessors' experience, teaching reflection, and learning method summaries. They can enlighten teachers and students, are good agents for improving teaching effects, and are also indispensable in the "service" resource pool. content.. As an ideal solution to education and business, K Series interactive flat panel features 10-point touch that enables several users working on the screen at the same time.IQClass 6.0 and installation-free IQClass Plus software help make an interactive teaching and collaboration.