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片断一:自主体验,感悟时间“秒”1.自主构建新知目标。师:看到课题你想知道什么?生:我想知道1秒有多长。生:我想知道1秒在钟面上是怎么显示的。生:我想知道分与秒有什么关系。……
Piece one: independent experience, perception time “seconds ” 1. Independently build a new target. Teacher: Do you want to know what you want to see? Student: I want to know how long one second. Health: I want to know how 1 second on the clock face is displayed. Health: I want to know what the minutes and seconds. ...