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【教学内容】北师大版《数学》三年级上册“什么是周长”第一课时。【教学目标】1.结合具体情境,通过问题驱动,借助直观操作活动,让学生在观察、比较、感受、体验、归纳中理解周长的含义。2.通过描一描、围一围、量一量等多种形式,使学生进一步加深对周长含义的理解,了解测量周长的方法,渗透“化曲为直”等思想,培养学生的空间观念。3.通过问题、反思、交流等手段,帮助学生积累学习活动的经验。结合具体情境,感知数学与实际生活的联系。
【Content】 Beijing Normal University version of “Mathematics” third grade on the book “What is the circumference ” The first lesson. [Teaching Objectives] 1. Combining with specific situations, through problem-driven, intuitive operation activities, let students understand the meaning of perimeter in observation, comparison, feeling, experience and induction. 2. By drawing a sketch, Wai Wai, a quantity and other forms, to enable students to further deepen the understanding of the meaning of the perimeter, understanding the method of measuring perimeter, infiltration Student’s space concept. 3. Through the problems, reflection, exchange and other means to help students accumulate experience in learning activities. Combination of specific contexts, perception of the relationship between mathematics and real life.