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让学生形成解决问题的基本策略是数学课程改革目标之一。教师在课堂教学中如何让学生初步掌握解决问题的策略,笔者拟通过圆锥体积公式推导的设计谈谈学生学习策略的培养。《圆锥体积公式》推导设计:(1)在认识圆锥体基础上讨论:用什么方法来推导圆锥体积。通过讨论,否定了将圆锥切割的方法(借鉴圆柱体积推导方法),肯定了可以把圆锥体完全浸入水中,看水面升高情况(借鉴“曹冲称象”知识),但也明白
Let students form the basic strategy to solve the problem is one of the goals of mathematics curriculum reform. How to let the students master the tactics to solve the problem in the classroom teaching. The author intends to talk about the cultivation of the students’ learning strategies through the design derived from the cone volume formula. “Cone volume formula” derivation design: (1) based on the understanding of the cone to discuss: In what way to derive the cone volume. Through the discussion, denied the method of cutting the cone (derived from the cylindrical volume derived method), affirmed that the cone can be completely immersed in water to see the situation of rising water (refer to “Cao Chong said” knowledge), but also understand