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一、如何把握教学重点一直以来,我们在处理“声音的产生与传播”的教学过程时,往往都认为声现象较简单,在声音的产生环节一般是简略探究一下,然后学习声音的传播,关于声音传播速度涉及计算,可能结合不同介质(如钢管与空气)进行一些课堂演练,也有结合回声进行计算的。我们知道本节的重点是“探究声音的产生与传播”。那么,课前预设的时间分配应该侧重于哪些呢?
First, how to grasp the teaching focus All along, we always deal with “sound generation and transmission ” teaching process, often think the sound phenomenon is relatively simple, the sound generation is generally briefly explore, and then learn the spread of sound , The speed of sound transmission involves calculations, some classroom exercises may be performed in combination with different media (such as steel pipe and air), and the echo calculation is also used. We know the emphasis of this section is “to explore the generation and dissemination of sound.” So, pre-class time allocation should focus on what?