smart board 55.Fourth, using whiteboard technology teaching the" blackboard " become " white " after teaching more exciting. Because the whiteboard technology makes the previous color monotonous, the blackboard that only ends with handwritten text and hand-drawn graphics is now colorful, and it can freely display books, edit and edit digital pictures and videos, which greatly enhances students' interest in learning and maintains Its attention. When the teacher uses the electronic whiteboard, the teacher can use the electromagnetic pen to operate the computer on the whiteboard as long as he is on the side of the whiteboard. He can also use the electromagnetic pen to write freely, and directly click on the eraser to change it. The teacher can freely annotate any picture projected onto the whiteboard, and use the electromagnetic pen to realize the seamless writing and drawing on the whiteboard. The electromagnetic pen can select the color and adjust the thickness arbitrarily, and can easily draw various beautiful graphics. In the process of teaching, the teacher can not only write and sketch on the traditional blackboard, but also drag, enlarge, rotate, erase, mask and so on.