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我在讲授《定滑轮》一课时,刚一上课,我播放了一个动画视频,视频描述的情景是:胖人用定滑轮从楼下往三楼运一袋重物,当他利用定滑轮把重物拉到三楼时,让一个瘦人帮忙拉住绳子,自己爬楼梯到三楼取重物,当胖人到达三楼时,却发现瘦人被高高地举起,而重物却在地面上。视频一播放,全体同学就像被施了魔法一样,一双双小眼睛都投向了大屏幕,有同学的脸上还露出了笑容。看到同学们聚精会神的表情,我心想:今天的苦心没白费,学生一定能顺利地提出
When I was teaching class “fixed pulley”, just after class, I played an animation video that described the scene as follows: a fat person uses a fixed pulley to load a bag of heavy objects from downstairs to the third floor when he uses a fixed pulley Heavy objects pulled to the third floor, so that a thin person to help pull the rope, climb the stairs to the third floor to take heavy objects, when the fat people reached the third floor, they found that thin people were lifted, heavy on the ground. Video play, all the students like being cast as magic, a pair of little eyes have been cast on the big screen, a classmate’s face also showed a smile. When I saw my classmates’ attentiveness, I thought: Today’s painstaking efforts are no problem and students will be able to put forward smoothly.