《日食和月食》是小学自然教材“宇宙”单元中比较重要的一课。这一课旨在通过观察、想象、分析和推理,揭示日食和月食的成因。但由于日食和月食并不是一种很常见的自然景象,也可以说大部分学生是没有这方面的感性经验的。因此,如果本课从日食和月食的现象引入,似乎脱离了学生的生活实际,对教学的顺利进行形成障碍。人教版在安排这部分教材的时候,从学生是否见过日食开始,通过一系列繁琐的问题,逐步让学生推测日食的形成可能是由于月球挡住了太阳的光,教学起来很费力,学生似乎也没有探究的兴趣。江苏省自然教材在这方面作了调整,前面没有出现一系列复杂的问题,但仍是从“你看过月食吗?”这样一个学生并不熟悉的现象入手,我觉得还是不利于激起学生探究的热情。我在教学这一课时,对教材进行了重新的处理。我是这样设计的: Eclipse and Eclipse are more important lessons in the Universe unit of primary nature textbook. This lesson aims to reveal the causes of eclipses and eclipses by observing, imagining, analyzing and reasoning. However, since eclipses and lunar eclipses are not a common natural phenomenon, most students also do not have any emotional experience in this area. Therefore, if this lesson is introduced from the phenomenon of solar eclipse and lunar eclipse, it seems that it has deviated from the actual life of students and hinders the smooth progress of teaching. PEP in arranging this part of the textbook, from the students have seen the beginning of solar eclipse, through a series of cumbersome questions, and gradually allow students speculated that the formation of solar eclipse may be due to the moon blocking the sun's light, teaching very laborious, Students also seem to have no interest in exploring. Natural textbooks in Jiangsu Province have been adjusted in this regard, did not appear in front of a series of complex issues, but still from the “you have seen a lunar eclipse?” This phenomenon is not familiar with a student to start with, I think it is not conducive to stir up Students explore the enthusiasm. When I was teaching this lesson, I re-processed the teaching materials. I designed it this way: