《义务教育数学课程标准》指出:“有效的数学学习活动不能单纯地依赖模仿与记忆,动手实践、自主探索与合作交流是学生学习数学的重要方式。”我们应提倡做中学数学、探究中学数学、合作交流中学数学,让学生在日常的教学活动中经历、感受、体验、探索。这里我以“圆锥的认识”为例进行概述:【案例】课一开始,我先出示一个圆柱,问学生:做一个圆柱需要哪些 “Compulsory education mathematics curriculum standards” pointed out: “Effective mathematics learning activities can not simply rely on imitation and memory, hands-on practice, independent exploration and cooperation and exchange is an important way for students to learn mathematics.” We should promote mathematics in secondary schools to explore Middle school mathematics, cooperation and exchange of high school mathematics, so that students in the daily teaching activities experience, feel, experience and exploration. Here, I give an overview of “Cone Recognition ” as an example: [Case] ​​The beginning of a class, I first show a cylinder, ask students: What do you need to make a cylinder