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2 Using sentences to talk about air
It keeps them high in the sky.
教学难点：
The sentence pattern:
Keep them clean….
课前准备：
1. The Ss’ books 2.The Ppt courseware 3. The computer
课时安排： 第2课时
教学过程：
The second period
Step 1:Pre- task Preparation
1 Retell the riddle by using three paragraphs. Show PPT.
We live on Earth.
There are many natural elements around us.
We can not live without them.
They’re important.
2. Guess a riddle.
1) T: Next we are going to guess a riddle. It’s a very long one. Please listen carefully and guess what it is.
Play the recording of “Listen and say”.
2）T:(write air on the blackboard) Yes, it’s air. Today we are going to talk about it.
3. Ask and answer.
T: What do you think of air?
How does a balloon lift people up?
How do kites and planes stay in the sky?
4.Read, match and write.
T: Air is important and useful in our life.
4 Ask and answer
T: Why is it important?
5 Think and complete
It is __________.