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四、Teaching steps
Step 1: Lead in:
Watch and say.
T: In this unit, we have learned about how to protect the earth. Now let’s watch a short video.
（教师播放reuse things institute广告）
Teacher ask: What can you see in the video?
(老师PPT展示广告中图片，引导学生说出：Plastic bottle 、plastic building roof、plastic fence 、plastic rubbish bin)
T：This is an advertisement of one American website. It tells us an important thing, What’s it?
Ss: Reuse! (教师板书本课中心词“reuse”在黑板上)
Quick response.
T: What can we reuse? Lead to : We can reuse everything around us.
（学生快速反映，教师闪现一些再利用的物品原始图片，学生进行思考讨论）
Step 2: Presentation.
1.Write and answer.
T: There are many things around us . What can we reuse them to do?
(学生拿出worksheet，完成reuse思维导图并表达We can reuse…to make a …）
T:That’s true. But easier said than done, let’s do it.
2.Watch and match.
Let’s waatch and see what wee can reuse them to do.
(教师播放视频学生观看并完成连线，塑料瓶、金属、衣服、纸盒、牙刷等可以如何再利用)
3.Make and say.
1）Think and discuss:
Teacher show more pictures to inspire the creation of students.
Ss take out the material and tools, discuss in groups :
What do you bring？ Can we reuse them? How?
(学生小组讨论各自所带物品如何再利用,交流并简要表达制作步骤，提出更多再利用方式)
2）Imitate and think out:
Teacher set an example about reuse. Write down some key step words, Ss follow to show their works in class.
(教师示范，板书步骤关键词，学生完善，并模仿简要表达制作步骤。)
Material needed: some plastic、scissors、decorate papers、stickers、colorful pens、strings