几何知识教学中初步培养学生空间观念

• 作 者: 陆友键
• 机 构: 吴县文教局教研室
• 出 处: 江苏教育
• 发表日期: 2004年期
• 关键词: 几何知识 空间观念 数学教学 进率 计量单位 面积单位 太远 相互位置关系 世界空间 图形制作

几何知识教学中,初步培养学生空间观念是一个重要的教学要求。但从我县目前小学数学教学实际情况来看,却存在着仅注重抓长度、面积、体积的公式、计量单位进率,偏重于这方面的计算,忽视对空间观念的培养的倾向。致使学生学过有关的几何知识以后,有的离开实物还想象不出相对应的图形,有的看到计量单位不能正确掌握它们的实际长度、大小,有的不能正确估计不太远的物体间的方向、距离。

In the teaching of geometric knowledge, it is an important teaching requirement to cultivate students' space concept initially. However, from the actual situation of primary school mathematics teaching in our county at present, there is a tendency that only pay attention to the length, area and volume formula, measure the unit rate, emphasize the calculation in this respect and ignore the cultivation of space concept. As a result, students can not figure out the corresponding figures even after they have learned the relevant geometric knowledge. Some people find that the units of measure can not correctly grasp their actual length and size, and some can not correctly estimate the objects that are not too far away The direction of the distance.