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教学内容:义务教育课程标准实验教科书数学(人教版)4年级下册第五单元。教材简析:学生通过第一学段以及4年级上册对空间与图形的学习,对三角形已经有了直观的认识,能够从平面图形中分辨出三角形。本节内容的设计是在上述的基础上进行的,教材的编写注意从学生已有的经验出发,创设丰富多彩的与现实生活联系紧密的情境和动手实验活动,以帮助学生理解三角形概念,构建数学知识。
Teaching content: Compulsory education curriculum standard experiment textbook mathematics (PEP) grade 4 volume fifth unit. Teaching materials: Students through the first semester and grade 4 on space and graphics learning, the triangle has been intuitively aware of the triangles can be distinguished from the plane graphics. The content of this section is designed on the basis of the above, the preparation of teaching materials to pay attention to starting from the students already experience, and create a rich and colorful real-life situations and hands-on activities to help students understand the concept of triangles to build Mathematical knowledge.