《分米和毫米》是老师们比较熟悉的教学内容,对于这两个长度单位来说,如果是仅仅要求学生认识并会进行相关单位的换算,那么教学目标是很容易达成的。可是如果想让孩子真正地把握长度单位的数学本质,形成表象,并灵活地应用它们进行度量,就不是那么容易实现的目标了。近日聆听了张冬梅老师的课,有了一些感悟。 The “decimeters and millimeters” are relatively familiar teaching materials for teachers. For these two units of length, the teaching goal can be easily achieved if students are only required to recognize and convert the units concerned. However, it is not so easy to achieve goals if children are to really grasp the mathematical nature of length units, form appearances, and apply them flexibly. Zhang Dongmei recently listened to the teacher’s class, with some insights.