Pre-reading, Reading, Comprehending    

Teaching Goals:

1.To read about global warming.

2.To get some idea about the effect of global warming.

3.To develop some basic reading skills.

Teaching Procedures:

Step 1. Warming Up

Purpose: To arouse Ss interest in learning about global warming.

1. Team work

Answer the questions below:

(1) Have you ever seen a greenhouse?

(2) How does a greenhouse work?

(3) What do you think greenhouse gases do?