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案例:A.教师甲的课堂里——师:(出示一个盒子,告诉学生盒子里有9个白球1个黄球)如果从中任意摸1个球,可能是什么颜色?(学生略作思考后猜测:摸到白球的可能性大)师:是不是这样呢?下面就请你们分小组摸球,记录自己摸球的结果,并与小组内的同学交流摸球情况。(各小组摸球、统计、讨论,教师巡视)师:谁愿意汇报一下你们小组交流的情况?(各小组汇报)师:摸出白球的次数多,说明摸出白球的可能性——(大),反过来说,摸出黄球的次数少,说明摸出黄球的可能性——(小)。
Case: A. Teacher A’s Classroom - Teacher: (Show a box telling students that there are 9 white balls in the box and 1 yellow ball.) What kind of color might be if you feel free to play a ball? Guess: the possibility of getting a big white ball) Teacher: is not it? Here you are invited to sub-team touch the ball, record the results of their own touch the ball, and communicate with the students in the group touch the ball situation. (Team Teams, Statistics, Discussions, Teacher Inspections) Teacher: Who would like to report your exchange? (Report from the group) Teacher: More white-out attempts to explain the possibility of finding a white ball - (Large ), On the contrary, the number of touch off the yellow ball less, indicating the possibility of finding a yellow ball - (small).