Teaching important points教学重点

Help the students learn how to debate over the topic "We should do nothing about global warming."

Teaching difficult points 教学难点

Enable the students to learn the writing skills of the text and get a better understanding of articles of this kind.

Teaching methods 教学方法

Listening, reading and group work.

Teaching aids 教具准备

A recorder and a computer.

Teaching procedures & ways 教学过程与方式

Step ⅠRevision

Check the homework.

Review the useful expressions about agreement and disagreement.

Step Ⅱ Pre-reading

Show a picture of greenhouse on the screen.

T: Now look at the picture. What is it in the picture?

S: A greenhouse.

T: Right .Who can tell me what it is used for?

Sa: A greenhouse is made of glass and is used for growing plants, especially during cold weather.

T: Yes, you are right. And how does it work?

Sb: The air inside is warm because the glass traps the heat from the sun and keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the cold period.

T: Exactly. Thank you. But today we are not going to talk about greenhouse, we'll