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1、人类的老师 教育随笔 今天教学人类的“老师”一课，这篇课文涉及到的科学术语比较多，“流线体”“薄壳结构”等都是。学生理解起来有一定的难度。解决的方法其实挺简单，那就是认真地阅读，在文章中找到答案。比方说“流线体”，文中虽然没有直接说出流线体的定义，但是从“有圆圆的大头的鲸，却常常轻而易举地超过海轮。发现它的外形是一种极为理想的流线体，而流线体放在水中受到的阻力是最小的。” 不难发现，所谓“流线体”是和鲸的体形差不多的。 老师在黑板上画一画，流线体的形状就有了，它的作用这几句话中也有答案，那就是减少了水的阻力。“薄壳结构”的解释同样也可以在书中找到，老师的作用就在于此。让孩子们自己朗读课文，寻找
2、答案。待添加的隐藏文字内容2 这篇文章的结构非常清晰，题目就很吸引人的眼球。你看人类的“老师”里面的“老师”二字还加上了引号。这说明了什么呢？从引号的作用来看，这个老师一定有着特殊的含义。如果学生有了要读的意思，那么第一自然段正好可以暂时回答大家的问题。哦，原来是鱼类啊！不过先别急，紧接着的更有意思，你看人类的“老师”还不止一个呢。 接下来就让同学继续学习三四五自然段，看一看它们分别写了人类的几位“老师”。通过他们的自由读，知道了人类的老师还有鸟类、昆虫、鲸鱼、鸡蛋等。就是这些耳熟的，甚至是整天相见的生物，人类通过模仿研究它们的构造，用来改进和提高我们的技术，并且创造出了更有价值的新东西，这就
3、是“仿生”。细看这几个小段。它的结构安排相差无几。都是人类通过模仿什么，然后改造了什么。这几段的教学完全可以举一反三了。29C91AFE4CED1B6C8795AD9C91AFE4CED1B6C8795AD91AFE4CED1B6C8795AD9C91FE4CED1B6C8795AD29C91AFEDD1B6C87D1B6C8795AD9C91AFE4CED1B6C8795AD91AFE4CED1B6C8795AD9C91FE4CED1B6C8795AD29C91AF95AD9C91AFE4CED1B6C8795AD91AFE4CED1B6C8795AD9D1B6C8795AD9C91AFE4
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