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五年级学生学习了求圆环的面积后,为了拓展我设计了求圆环的外圆周长的练习课感受颇深。一、借诗引思,体现科学人文精神一上课在黑板上工整地写上“坐地日行八万里,巡天遥看一千河”并把“八万”和“一千”用红色笔写。师:同学们你们知道这句诗是谁写的吗?它的含义是什么?生1:是描写打麻将的(学生轰堂大笑)他说他爸爸昨天摸了一张“八万”赢了一千元。我没有质问他,反而微笑着说:打麻将是一种智力游戏,要用到数学知识,但不能用来赌博啊!生2:是太阳绕地球转?我说:是吗?接着视频播放:太阳、地球、月亮的运行画面,再用三球仪演示。
Fifth grade students to learn the area of the ring, in order to expand my design of the outer circumference of the ring circumference of the practice class feel deep. First, by borrowing poetry, reflect the spirit of scientific humanism A class on the blackboard neatly written on the “sitting on the line eighty thousand miles, watching a thousand days away” and “eighty thousand” and “one thousand ”Written in red pen. Teacher: Students, you know who wrote this poem? What is its meaning? Health 1: Description of playing mahjong (students bangs) He said his dad touched a “80,000 ”Won a thousand dollars. I did not ask him, but smiled and said: playing mahjong is an intellectual game, to use mathematical knowledge, but can not be used to gamble ah! Health 2: The sun revolves around the earth? I said: yes? Then the video player: The sun, the earth, the moon’s running picture, and then three-ball instrument demonstration.