对五年级学生来说,学习“用数对确定位置”是比较顺当的事情,因为他们从一年级开始就学习了用“第几”描述物体在某个方向上的位置,到二年级又学习了用“第几排第几个”这样的方式描述物体在平面上的位置。而且,学生从生活中知道了一些关于确定位置的事实性知识,积累了用“序数”表示物体位置的初步经验。按理说,这样的内容教学起来应该是极其顺畅的,可是在我听过的几节课中,教学并不顺利。课堂教学中,有的老师基 For fifth-graders, learning “using numbers to determine where ” is a good thing because they learned from the first grade that the object’s position in a certain direction is described by The second grade also learned to use “the first few rows ” this way to describe the position of objects in the plane. Moreover, students know some factual knowledge about location from life, and accumulate the initial experience of using “ordinal ” to indicate the position of the object. Logically, such content should be extremely smooth teaching, but in the few lessons I’ve heard, teaching does not go well. In classroom teaching, some teachers base