《数学课程标准》指出:要倡导学生操作体验、自主探究、合作交流的学习方式与接受性学习方式的较好融合。因此,进入课改实验后,一线教师频繁地把小组合作学习方式运用于数学课堂。《圆锥的侧面积》教材参考指出这一节是前一节《弧长及扇形面积》的拓展、延伸,这种拓展不仅仅是知识方面的拓展也是思想方法和活动经验方面的拓展,而且后者尤为重要。通过“弧长及扇形面积”这一节知识点的学习,学生已经掌 The “Mathematics Curriculum Standard” points out: It is necessary to advocate the better integration of learning experience and self-exploration, cooperation and exchange between learning and accepting learning styles. Therefore, after entering the curriculum reform experiment, front-line teachers frequently apply the group cooperative learning method to math class. The reference to the “Cone Side Area” textbook indicates that this section is the expansion and extension of the previous section, “Arc Length and Sector Size”. This expansion is not only an extension of knowledge but also an extension of ideas and activities experience. Especially important. Through the “arc length and fan area” this section of knowledge point of learning, the students already have palm