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一、教学内容 人教版十二册圆柱的体积(P36-38例4、例5,练习1-2题)。 二、教学设想 先通过让学生回忆推导圆面积计算公式时,是怎样把圆转化成已学过的图形的,再提出圆柱能否转化成已学过的立体图形,求出它的体积。其重点难点是让学生认识理解圆柱体体积计算公式的推导,重在应用。根据学生的认知特点和教材的知识结构,设计上应着重考虑如何用计算机、实物展出台等电教手段优化教学、突出重点,突破难点,同时也结合学具操作等传统的教学手
First, the teaching content PEP 12 volumes (P36-38 cases 4, Example 5, exercise 1-2 questions). Second, the teaching idea First by allowing students to recollect the deduction of area calculation formula, is how to turn the circle has been learned graphics, and then proposed cylinder can be transformed into learned stereoscopic graphics, find its volume. The key difficulty is to enable students to understand the derivation of understanding cylindrical volume calculation formula, focusing on the application. According to the cognitive characteristics of students and the knowledge structure of teaching materials, the design should focus on how to use computer, physical display units and other audio-visual methods to optimize teaching, highlighting key points, breaking the difficulties, but also with the traditional teaching operation