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按群数是培养幼儿脱离逐个点数,提高计算能力的重要途径。在《幼儿园教育纲要》中,对大班认识时钟的“分”并无教学要求,但在幼儿练习5个5个数时,结合认识时钟的“分”未尝不可。一次,当幼儿复习5个5个数时,我出示了一张大钟面,让他们观察钟面上的小格。孩子们发现,钟面上任何两个数字之间都有5格,可以5格5格地数。数的结果,有60格。我告诉幼儿:1格表示1分钟,分针走了多少格,就是走了多少分钟。于是,孩子们便懂得:分针走一圈就是60分钟(60格)。尔后,我发给幼儿每人一只教具钟,让他们按本周一些电视节目的时间(事先拿来一张电视报)拨分针,边数边拨:
According to the number of groups is to train children from the point by point, an important way to improve computing power. In the “Outline of Kindergarten Education,” there is no teaching requirement for recognizing the clock in the big class. However, when the children practice 5 or 5 numbers, it is not unreasonable to combine the “minute” of the clock. Once, when the children reviewed five and a half numbers, I showed a large clock face and let them observe the small squares on the clock face. Children find that there are 5 squares between any two numbers on the clock face, which can be 5 squares and 5 squares. Number of results, there are 60 cells. I told children: 1 grid that 1 minute, minute hand how many cells go, that is, how many minutes to go. As a result, children will understand: a minute walk is 60 minutes (60 grid). Later, I issued a bell for each of the young children to dial a minute hand at the time of some television shows this week (a video was taken in advance)