can whiteboard paint be removed.Classroom teaching is one of the most abundant places where people interact with each other. Teachers can make full use of language, gestures, eye contact and other methods to guide classroom teaching. However, the traditional multimedia classroom teaching requires teachers to sit in front of the podium and use the keyboard, mouse and other non-humanized methods to teach. When applying interactive whiteboard teaching, a whiteboard sensor pen in the teacher's hand is not only a multi-function pen but also a mouse, thus breaking the limitation that the teacher can only use the mouse in front of the computer when using the multimedia courseware teaching. Give teachers more space to make teaching more vivid, strengthen the collision and exchange of ideas between teachers and students, and the teaching effect is twice the result with half the effort. In the classroom, the harmonious harmony between teachers and students is the premise for students to concentrate on listening, and it is also one of the strong guarantees that classroom efficiency can be improved.