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5.树立环保意识，践行环保理念。
三.Focus of the lesson and predicted area of difficulty 教学重点和难点
1.初步了解句型What makes...dirty/messy?...make(s)...dirty/messy.以及What can we do to...?We can....
2.本课中四会及三会单词的正确读音。
3.能运用所学词句复述或表演课文章节。
4.初步掌握句型What makes...dirty/messy?...make(s)...dirty/messy.以及What can we do to...?We can....
5.能运用所学词句复述或表演课文章节。
四.Teaching procedures 教学过程
Step 1 Free talk
T:What day / date is today? What’s the weather like today? What did you do last Sunday?
T:Where did you go last summer holiday ?
S: I went to …
T: Do you like that city ? Do you like Nanjing ?
S:Yes, I do .
T: That sounds great. Did you take any photos?
S: Yes ,I did. / No, I didn’t.
Step2: Presentation（1）
1.Watch a vedio（引出clean, beautiful, messy 和dirty四个词）
T:Boys and girls, now let’s watch some pictures about Nanjing, OK?(观看关于南京美景的一段小视频)
Ss: OK.
T: What do you think of Nanjing ?
Ss: It’s c_____ and b________.(引导学生说出It’s clean and beautiful)
T:Now let’s look at another pictures of our city. Are they clean and beautiful?
Ss: No, they are ______and______.(引导学生说出messy and dirty,并进行教授)
【设计意图：通过几张城市美、脏图片的对比引出城市污染严重这一话题，为下一步学习进行铺垫。】
2.Look and choose:
T:What makes our city dirty?(课件出示四幅图片：clouds, smoke, rain ,rubbish)
Ss: Smoke and rubbish .
3.Think over:
T:What will the dirty city take to us?(引出：deaths, diseases, pollution等词)