smartboard can't write on powerpoint.The electronic whiteboard has a spotlight function. When the teacher needs to emphasize the content of a certain part of the courseware and let the students have a more profound and intuitive understanding, the teacher can use the spotlight to enlarge the part to the majority of the screen. Focus the students' attention instantly on this part so that students can understand the content of the part more deeply. The electronic whiteboard comes with a material library. Teachers can save the pictures, audio, video and other materials needed for the class into the material library. When the lectures are needed, they will be dragged to the screen with an electronic pen, and then according to the needs of the teacher. Combinations, such as the connection of physical circuit diagrams, the connection of instruments in chemical reactions, etc. Then there is the pull function of the electronic whiteboard. When the teacher needs to display a part of the screen and want to hide other parts, the screen pull function can be used. Although this function can also be implemented with PPT, the teacher pulls up and down and left and right. Students can see the teacher's movements intuitively and closely. In the past, only the teacher operated the computer, and the student's attention needs to be changed between the screen and the teacher, which can close the distance between teachers and students.