digital whiteboard on tablet. with With the development of modern science and technology, all kinds of multimedia have also entered the classroom one after another, which has certain assistance to teaching. Especially the application of electronic whiteboard is a direction of current teaching reform. On the one hand, it provides the diversity of external stimulation to facilitate the acquisition of knowledge. On the one hand, it is helpful to stimulate students' interest in learning. And the role of cognitive subjects. Students gain knowledge, first from passive acceptance, and second from active learning. We should advocate for students to actively acquire knowledge under the guidance and guidance of teachers. Appropriate application of audio-visual means for teaching can strengthen the guidance of students' learning methods, so that under the guidance of teachers, students can learn from the unknown, from knowing less to knowing more, and learning how to learn while learning mathematics. . Therefore, the use of audio-visual means in classroom teaching can effectively open the gates of students' thinking, stimulate associations, stimulate exploration, and lay the foundation for the success of a class. The electronic whiteboard can record and preserve the whole process of teaching and learning in real time. Teachers can call the classroom teaching materials stored in the computer at any time, no longer worry that the contents of the blackboard can not be reproduced; at the same time, the electronic whiteboard enables teachers and students to achieve positive interaction in the classroom teaching, which helps to improve students' interest in learning, than the projection screen. The display content that can only be "changed" is more suitable for the needs of diverse teaching and creative teaching. So how to apply the electronic whiteboard in mathematics teaching, through the use in recent years, I have summarized the following methods. . The IQAio GR519 is an upgraded lightweight version based on the original IQAio GR511. The original dual-cavity structure was changed to a bottom-edge structure, so that the minimalist design accommodates modern classrooms and conference rooms. With one IQProjector V2 and one IQView E3821, you can achieve flexible and intelligent classroom.