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本资料来自于资源最齐全的２１世纪教育网www.21cnjy.com
1教学目标
1、理解月亮的形状会改变。
2、理解星星在天空中会组成形状。
2学情分析
三年级学生已经有一定的科学知识基础，本课的月亮与星星是对前一课日与夜的延伸。
3重点难点
理解月亮为什么会改变形状。
4教学过程
4.1 第一学时
教学活动
活动1【导入】导入活动
T: Now please talk about the moon with your friends.21cnjy.com
T: Look at the moon. ( http: / / www.21cnjy.com ) What shape is it (展示shape的单词卡片，让学生初步感知shape这个词)。21·cn·jy·com
T：It’s round now. Wha ( http: / / www.21cnjy.com )t shape will it be tomorrow Please draw and show it to your friend.www.21-cn-jy.com
活动2【导入】月亮
1、T: I’m going to sho ( http: / / www.21cnjy.com )w you the photos of the moon. Please look at the moon carefully, let’s see what happens.21世纪教育网版权所有
学生观察月亮变化的过程（PPT呈现）
T: What can you see What happens
T: What does the moon change
The moon changes its shape(再次让学生感知shape这个词)。
、月相图的呈现和介绍
T:播放月相介绍视频。
Look, this is ( http: / / www.21cnjy.com ) the phase of the moon. Look at the moon, we can call it the new moon\quarter moon…（教师逐一为学生介绍新月以及上弦月等，让学生对月相有所感知）。
重复： The moon changes its shape.
3、听《月亮姐姐做衣裳》的故事
第三次让学生重复“The moon changes its shape.”
4、Sum up
T: What did you learn about the moon
S：The moon changes its shape.
活动3【导入】了解星星
1、让学生欣赏星星的图片。
T: Are these pictur ( http: / / www.21cnjy.com )es beautiful What can you see in the picture There are so many stars in the night sky.2·1·c·n·j·y
T: I think one st ( http: / / www.21cnjy.com )ar isn’t beautiful, but many stars together are beautiful, do you know why 【来源：21·世纪·教育·网】
T: Stars can form different shapes. What shape do the stars form
连接星星组成不同的图案
完成P26。
T: What shape does it form
S: The dipper.
T：So we call the stars “The Big Dipper”. (展示“The Big Dipper”词卡，教读。)
T: Stars can form ( http: / / www.21cnjy.com ) many different shapes.Please take out your paper sheets, there are so many stars, please match them together, and let’s see what shapes do they form.
T: What shape does it look like 学生将自己连接的星星图形说出来。
出示大熊座、巨蟹座以及大犬座的图片，再次让学生观看和感知
T: OK, now, what did you learn about the stars
再次引出：Stars can form shapes in the sky.
活动4【导入】总结
1、T：What did you learn in this class
（Now I know）The moon c ( http: / / www.21cnjy.com )hanges its shape. Stars can form shapes in the sky. One of the shapes is the Big Dipper.21教育网
2、赏析《认识星座》。
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