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教学内容:北师大版三年级数学上册第五单元。教学目标:1.结合具体事物或图形,通过观察、操作等活动,认识周长。2.能测量并计算三角形、平行四边形、梯形等图形的周长。3.结合具体情境,感知周长与实际生活的密切联系。教学重、难点:认识周长,理解周长的含义,发展空间观念。教学
Teaching content: Beijing Normal University version of the third grade mathematics on the fifth unit. Teaching objectives: 1. Combination of specific things or graphics, through observation, operation and other activities, understanding perimeter. 2. Can measure and calculate the triangle, parallelogram, trapezoid and other graphics perimeter. 3. Combination of specific context, perceive the perimeter and the close contact with the real life. Teaching heavy, difficult: understanding perimeter, understanding the meaning of perimeter, the development of space concept. teaching