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一、教学设计1、教学内容苏科版《数学》七年级上册第五章第二节“展开与折叠”(第一课时).2、教学目标(1)学生通过动手实验,运用讨论等方法,认识多面体与它们展开图的关系.(2)能正确判断展开图是哪个几何体的展开图.(3)经历和体验图形的变化过程,发展空间概念,养成研究性学习的良好习惯.3、教学重点、难点重点:将几何体展开成展开图,利用模型将展开图折叠成几何体.难点:不用模型,展开想象,由展开图怎样叠成几何体.展开图中,各个面在几何体中的对应位置的判断.
First, the teaching design 1, teaching content Suke version of “Mathematics” seventh grade on the fifth chapter second chapter “Expand and fold ” (the first class) .2, teaching objectives (1) students through hands-on experiment, the use of the discussion (2) It can correctly judge which of the geometrical entities the exploded view is. (3) Experiencing and experiencing the changing process of the graphic, developing the concept of space, and developing the good habit of researching learning .3, teaching focus, the difficult point of focus: the geometry expanded into the expansion diagram, the model will expand the figure folded into a geometry. Difficulty: No model, expand the imagination, expand the figure how to fold into the geometry .Expansion of the figure, the various faces in the geometry The corresponding position of the judge.