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几何知识在小学数学教学中一直是非常重要的内容。《数学课程标准》(2011版)要求学生经历图形的抽象、分类、性质探讨、运动、位置确定等过程,掌握图形与几何的基础知识和基本技能;要求学生建立空间观念,初步形成几何直观。具体到图形的认识,重要的是对图形本质特征的把握,以及在认识图形的过程中发展学生的数学思考,提升数学空间观念。因此,教师在教学中应紧密联系学生的生活实际,促使学生在情境中认知,在探索中建构,在活动
Geometry knowledge has always been a very important element in elementary mathematics teaching. The Mathematical Curriculum Standard (2011 Edition) requires students to master the basic knowledge and basic skills of graphics and geometry through the process of abstracting, classifying, exploring the nature, movement and position of the students. Students are required to establish the concept of space and initially form the geometric intuition. Specific to the understanding of graphics, it is important to grasp the nature of graphics, as well as the development of students in the process of understanding graphics mathematical thinking to enhance the concept of mathematical space. Therefore, teachers in teaching should be closely linked with the students’ actual life, to promote students to recognize in the context, to explore the construction, in the activities