演示是教学中一种常见的方法。利用计算机模拟演示可将有关的教学内容通过文字、动画在屏幕上显现出来，帮助学生获取第一手资料，掌握相应的事实，产生相应的认知感受和情感体验。数学知识源于生活，但受时间和空间的限制，一些动态的变化过程利用常规媒体不易在课堂上表现， Demonstration is a common method in teaching. The use of computer simulation shows that the relevant teaching content can be displayed on the screen through text and animation to help students obtain first-hand information, grasp the corresponding facts, and generate corresponding cognitive experiences and emotional experiences. Mathematics knowledge comes from life, but it is limited by time and space. Some dynamic changes make use of conventional media not easy to perform in class.