课改提倡将学习的主动权还给学生,让学生成为知识的真正构建者,引导学生进行创造性学习。初中生喜欢观看,喜欢动手,自制教具极具形象性,这更利于激发学生的学习兴趣,引导学生主体参与、主动思考,使学生展开自主探究活动,加强知识的理解,掌握基本的数学思想与方法,是提高数学教学有效性的重要手段。 Curriculum reform advocates the initiative to learn back to students, so that students become the real builders of knowledge, and guide students to creative learning. Junior high school students like to watch, like hands, self-made teaching a great image, which is more conducive to stimulate students interest in learning, to guide students to participate in the main, take the initiative to think, so that students explore their own activities to enhance knowledge and understanding of basic mathematical concepts and master Method is to improve the effectiveness of mathematics teaching an important means.