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教学内容分析《趣味周长练习》是在学生掌握了长方形周长一般算法的基础上,一节侧重探索图形规律,进而应用规律解决开放性问题的习题指导课。“多连方”图形游戏在浙教版教材中多次出现(一上第32页第5题、一下第52页第6题、三上第99页练习第1题、第102~103页新课《四连方图形》、第106页1～3题以及三下第43页练习1～4题等),学生对多连方的图形特征比较熟悉,此次探究“根据已知周长勾画多连方图形”的问题,可以帮助学生在稍复杂的问题情境中进一步落实周长的概念,提高应用长方形周长计算公式的深
Analysis of teaching content “Peripheral Exercises” is based on the students grasp the general algorithm of perimeter of the rectangle, a section focused on exploring the laws of graphics, and then apply the law to solve the problem of openness guidance class. “Multi-party ” graphic games appear in the teaching materials in Zhejiang Province many times (one on the 32nd page of the fifth title, about the 52nd page 6th title, three on the 99th page of the first title, 102 ~ 103 Page New Lesson 4 Graphics, page 106 1 ~ 3 questions and 3 next page 43 exercises 1 ~ 4 questions, etc.), the students are more familiar with the graphic features of multiple parties, the inquiry “according to known Peripherals sketched multi-party graphics ”problem, can help students to further implement the concept of perimeter in a more complex problem situations, improve the application of the formula of the perimeter of the rectangle perimeter