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【教学目标】知识目标:结合观察、操作、比较、测量以及计算等活动,让学生理解周长的含义,感悟周长的概念。能力目标:在学生获取知识的同时,培养他们观察思考和动手操作的能力,学会用不同的策略解决问题,体会“化曲为直”的数学思想。德育目标:在实际的学习活动中激发学生探索问题的兴趣,增强对数学学习的严谨态度和理性精神,培养学生的探究意识和与他人合作的习惯。【教学重难点】教学重点:理解周长的意义,会测量图形的周长。
【Teaching Objectives】 Knowledge Objectives: To combine activities of observation, operation, comparison, measurement and calculation so that students can understand the meaning of circumference and perceive the concept of circumference. Objectives: Students acquire knowledge at the same time, develop their ability to observe and think and do their work, learn to use different strategies to solve the problem, “melody is straight ” mathematical thinking. Moral Education Objectives: In the actual learning activities to stimulate students to explore the issue of interest, enhance the rigorous and rational spirit of mathematical learning, develop students’ awareness of exploration and cooperation with others habits. Teaching heavy and difficult teaching focus: to understand the meaning of circumference, will measure the circumference of the figure.