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在引导学生学习《反冲》一课时,我改变以往教师“引导”过多的现象,作了一次大胆的尝试。 一、自由探究 实验前,先让同学们观察材料(气球、带气球的小车、有洞的塑料瓶等),接着要求:“自己想办法让小车跑起来、水瓶转起来、气球飞起来?”将学生“引”到自行探究的路上。至于如何实验,采用什么样的方法步骤,注意什么问题,教师有意不讲,而让学生自己去摸索。实验中出现了丰富多采的现象:给气球吹足气后,把小车放在桌面上时,气已从气球口处放完,小车在桌上一动不动;有的把小车放到桌面时,气球已不是很鼓了,小车只能在桌上慢慢移动一点,
In guiding students to learn the lesson of “recoil”, I made a bold attempt to change the phenomenon of “leading” excessive teachers in the past. First, free to explore the experiment, let the students observe the material (balloons, balloons with a car, a hole in the plastic bottle, etc.), then asked: “I think of ways to get the car running up, water bottle turn up, the balloon fly? Students ”lead" to explore their own way. As for how to experiment, what kind of method and steps are taken, what problems should be paid attention to, teachers should not talk about it, let the students explore the problem themselves. The experiment appeared a rich and varied phenomenon: After blowing the balloon to the gas, the car on the desktop, the gas has been discharged from the balloon mouth, the car motionless on the table; and some put the car on the desktop, Balloon is not very drum, the car can only move slowly on the table a little,