[教材分析]六年制小学《数学》第十二册圆柱、圆锥是小学阶段学习几何知识的最后一部分内容。而生产、生活中我们经常遇到各种形态的物体,学生产生了探索它们体积的兴趣。为了满足学生的求知欲,也为进一步学习和解决实际问题奠定基础,我设计了这堂数学活动课。[教学设想]本课只 [Textbook analysis] six-year primary school mathematics twelfth column, cone is the last part of the learning geometry of elementary content. In production, we often encounter various forms of life objects, students have to explore their volume of interest. In order to satisfy students’ thirst for knowledge and to lay the foundation for further study and solution to practical problems, I designed this math class. [Teaching ideas] this lesson only