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When the teacher uses projector in class, the students can not focus on what teacher says for a long time. Using the laser pointer can mark the point on the image temporarily and stay for a time, so that it makes the point clearly and improves the efficiency. Accordingto the actual class content, the teacher can make different hand-painted tags, just like graffiti, drawing and so on. It can adjust and lighten the atmosphere in class. The students have a better understanding of texts efficiently. The laser pointer can also beused on other occasions, such as meetings.