目前，课堂教学仍然是我国基础教育教学的主要形式，故有人把它称为素质教育的主战场。在以班级授课形式的课堂教学过程中，通过教学设计，根据教学内容与教学目标的需要，合理地选择和应用电教媒体，以达到优化课堂教学的目的。１　增强学生参与学习的主动性　　教学效果的好 At present, classroom teaching is still the main form of basic education in China, so some people call it the main battlefield of quality education. In class teaching in the form of class teaching process, through teaching design, according to the teaching content and teaching objectives, the rational choice and application of audio-visual media, in order to achieve the purpose of optimizing classroom teaching. 1 to enhance student participation in learning initiative teaching effect is good