圆锥的体积是在学习了圆锥的认识的基础上进行教学的。这节课我是这样设计的:第一部分,复习圆锥的特征以及圆柱的体积=底面积×高。反思:复习旧知识之间的联系,便于运用已学知识推动新知识的学习,为学习新知识做准备。第二部分,研究圆柱体积的计算公式,先让学生用转化的思想大胆猜测,能否把体积计算方法转化成已学过的立体图形来推导圆锥体积公式呢?学生猜 The volume of the cone is taught on the basis of knowing the cone. This lesson I designed like this: The first part, review the characteristics of the cone and the cylinder volume = bottom area × height. Rethinking: Reviewing the connection between old knowledge, facilitating the use of learned knowledge to promote learning of new knowledge and preparation for learning new knowledge. In the second part, we study the formula of cylindrical volume, let students boldly guess with the idea of ​​transformation, and whether the volume calculation method can be transformed into the learned three-dimensional figure to deduce the cone volume formula.