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教学内容:青岛版《义务教育教科书·数学》三年级上册第83~84页信息窗1。教学目标:1.结合具体情境理解周长的意义,能指出并测量简单图形的周长。2.让学生在实际操作中经历周长概念形成的过程,积累数学活动经验。3.感受数学知识间的内在联系,体会数学知识与现实生活的密切联系。教学重、难点:理解和掌握周长的意义,会用不同方法测量简单图形的周长。课前思考:“图形的周长”是“图形与几何”领域的重要内容之一,现实生活中学生对周长
Teaching content: Qingdao Edition “compulsory education textbook · Mathematics” third grade on the first 83 ~ 84 information window 1. Teaching objectives: 1. Combination of specific context understanding of the meaning of perimeter, can indicate and measure the circumference of simple graphics. 2. Students in the actual operation experience the concept of the formation of perimeter process, the accumulation of mathematical experience. 3. Feel the inner connection between mathematical knowledge, understand the close relationship between mathematical knowledge and real life. Teaching heavy, difficult: to understand and grasp the meaning of circumference, will use different methods to measure the circumference of simple graphics. Thinking before class: “The perimeter of the graph ” is one of the important parts in the field of “Graphics and Geometry ”. In real life,