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【教学内容】苏教版小学数学三年级上册第46~47页。【教学目标】1.使学生通过拼一拼、比一比、画一画、量一量等活动,加深对周长含义以及长方形、正方形周长计算方法的理解。2.使学生在活动过程中进行观察、比较、测量、计算和估计,发展空间观念,提高分析和解决问题的能力,积累数学活动经验。【教学设计】一、复习周长的意义谈话:(出示图1)我们学习了图形的周长,请你用手比画下面每个图形一周边线的长。
【Teaching content】 Sujiao version of elementary school mathematics third grade 46 ~ 47 pages. 【Teaching Objectives】 1. To enable students to spell competition, than one, draw a picture, quantity and other activities, to deepen the meaning of the perimeter and rectangular, square perimeter calculation method of understanding. 2. To enable students to observe, compare, measure, calculate and estimate during the activity, develop the concept of space, improve the ability to analyze and solve problems, and accumulate experience in math activities. 【Teaching Design】 First, review the meaning of the perimeter Talk: (Figure 1) We have studied the perimeter of the graph, please draw a hand next to each graphic a perimeter line length.