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自制课件等
教学过程：
StepⅠ Warm up（热身）
1. Greetings.
2. Guessing game.
Step Ⅱ Presentation and practice （自主探究）
1.生词关
T: Please write the meanings on your paper
air______ plant______ alive _________ everywhere_______ important ______
2. Learn the new words.
T: Let’s listen and say the new words.
Ss: read these words after teacher.
3. Work in groups to read the new words. Recite(背诵) the new words, and then recite in groups。
4. Watch the screen and learn to say the sentences.
5. Ask pupils to talk about the famous cities of the world in groups .
Sept Ⅲ Learn the text （文本学习）
T: Here’s a riddle（谜语）. It’s very long . Please listen carefully and guess what it is. What is it?
Ss: Air.
T: Yes, What do you think of air?
S1: Air has no colour.
S2: Air has no smell and taste.
S3: …
T: Yes. We can’t see it,but we can feel it. Air is important to all living things.
T: Can you talk about air? Work in groups .
Ss: talk each other.
Tasks the pupils to answer the questions on Page 69.
Think and say: 复述课文，回答问题。
What is it?
Does it have any colour or taste?
Can you see or feel it?