21世纪我们面临的是一个信息化的社会,我们的学生必须学会选择、学会思考、学会广泛而有效地接受和处理各种信息。而多媒体可以化静为动,化虚为实,化抽象为直观,能够拓宽课本知识体系,拓宽教学的时间和空间,拓宽和加深课堂学习的内涵和外延。因此,利用多媒体可以很好地提高初中生物课堂教学的有效性。 The 21st century we are facing is an information society, our students must learn to choose, learn to think, learn to widely and effectively accept and deal with all kinds of information. The multimedia can be static and dynamic, virtual reality, abstraction is intuitive, to broaden the textbook knowledge system, broaden the teaching of time and space, broaden and deepen the content of classroom learning and extension. Therefore, the use of multimedia can effectively improve the effectiveness of junior high school biology classroom teaching.