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教学重点：能正确地理解并朗读对话内容，在教师的引导和帮助下复述课文内容。
教学难点：能初步运用本课所学的词汇和日常用语谈论城市的污染问题并能说出多种解决方案。
Teaching procedures 教学过程
Step 1 Greeting & Sing a song
1. Greeting
T: Good morning, boys and girls.
S: Good morning, Miss Liu..
T: Nice to meet you.
S: Nice to meet you, too.
2. Sing a song
T: I have two animal friends, one named Jack and one named Jill. Do you want to meet them?
S: Yes.
T: OK, listen! Here they are. (播放歌曲Two little blackbirds一遍)
T: Do you like this song? Now follow me. (老师带着学生用手势表示歌词内容，学生边唱边学做动作) This time, let’s try to sing and do some actions together.
(再次播放歌曲，学生加上动作一起唱)
【设计意图：让学生体会named, fly away, come back的意思，让学生在欢快的音乐中开始一堂新课，也为下一步学习进行铺垫，通过歌曲中自由飞翔的小鸟引出城市环境这一话题。】
Step 2 Presentation
1. Talk about Yangzhou
T: A lovely song, yes?
S: …
T: (教师利用歌曲Two little blackbirds向学生提出几个关于鸟的话题)
Do you like birds?
What birds do you know?
Can you see any birds in our city?
Where can you see any birds?
T: Ok. These two birds fly to our city Yangzhou.(向学生展示一组风景优美、环境幽雅的扬州城市图片，然后提出问题让学生思考和讨论，引入话题) These pictures are of Yangzhou. What can you see in the pictures?
S1: I can see a lot of beautiful flowers and trees.
S2: I can see many birds. They are flying high in the sky.
S3: I can see a clean river.
S4: I can see a clean road.