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录音机、自制课件、照片等
教学过程：
StepⅠLead-in
T: Ok, class begins. Hello boys and girls.
S: Hello, teacher.
T: Sit down please.
S: Thank you.
T: Great. Now you can see I have a bag here. In this bag, there is something important to you(just all of you).I want you to guess what is is my bag? Just think and guess.(叫几个学生回答问题，学生们可以发挥想象）
T: Good. Now I open it and you just take a look. Can you see anything?（叫几名学生，去证实这个情况）
S： No.
T: No? Ok, this time we all know you can not see anything in my bag, right?
S: Yes.
T: Great. Now smell it. Is it smelly or fragrant? Can you smell anything?（叫几名学生，自己去感受）
S: No.
T: No? Ok, this time we all know it has no smell. Right?
S: Yes.
T: Wonderful. Now,touch it. Put your hands in my bag. Can you feel anything?（叫几名学生，自己去感受）
S: No.
T: Ok, now let’s see it together. It’s just an empty plastic bag. But in it it’s very important to you, to all of us. We all depend on it. What is it? S: It is air.
T: Great. It is air. So today we are talking about air. Unit 2 Air (read after me)
Step ⅡPresentation
T: Ok, before our class, we all know we can not see it, that means what colour is it? Is it blue? S: No. T: Is it purple?
S: No. T: Is it black? S: No.
T: So it has no colour. Great. Emmmm.. Is it a triangle? S: No. T: Is it a circle? S: No. T: Is it a square? S: No.. So it has no shape.
Then can you smell it? S: No. T: Can you taste it? S: No. T: So it has no smell or taste. Great. We cannot see it, but when I do this,can you feel it? S: Yes. T: It can make you feel cool. It can make you survive. Although you cannot see it, sometimes you can feel it. Great,because it is everywhere.
T: Wonderful. Now listen to the tape and read after it. Are you ready? S: Yes.
T: According to the first part, we all know it has no colour, no shape, no smell, no taste. But we can feel it. （学生们一起说） It talks about the shape of air.
T: Now let’s see. The air is everywhere. We can not live without air. So it is very important to all people/all of us. Great. Look at these flowers and other plants, is the air important to them? S: Yes.
T: Wonderful. At the same time, look at the running dog and the flying birds. Is the air important to them? S: Yes.
T: Great. So the air important to animals and plants. We cannot live without it. So we all need it to keep us alive. Any questions?