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小学数学北师大版第六册第四单元“面积”的第一课时“面积的认识”。教材分析:“面积”概念是在学生已经掌握了长方形、正方形的特征以及周长计算的基础上进行教学的。学好这部分知识,不仅有利于发展学生的空间观念,也是学习和探索其他平面图形面积计算方法的重要基础。本课教材安排了三个实践活动:一是创设情境,让学生初步感知面积的含义;二是比较图形面积的大小,体验比较面积大小策略的多样性;三是通过画图,加深学生对面积的认识。
Primary school mathematics Beijing Normal University version sixth book fourth unit “area ” the first class “area of knowledge ”. Textbook Analysis: The “Area ” concept is based on students having mastered the characteristics of rectangles, squares, and perimeter calculations. Learning this part of knowledge not only helps to develop students’ concept of space, but also is an important foundation for learning and exploring other methods for calculating the area of graphic objects. The textbook arranged three practical activities: First, create the situation, so that students initially perceived the meaning of the area; the second is to compare the size of the graphics area to experience the diversity of the size of the area; Third, through drawing, to deepen the students of the area understanding.