外研版高中英语必修1module5alessoninalab第二课时教案

外研版高中英语必修1module5alessoninalab第二课时教案内容摘要：

g) He is blowing the paper. T: All of these descriptions are very good. Now let’ s listen to the tape to find the aim and put the stages in the correct order. After the students finish the task, check their answers with the whole class by listening to the material again. T: Well, it’ s time for us to have a speaking. Look at Exercise 15. Take it in turns to describe the experiment. Use these words and phrases in the box. Give the students some time to do the job. And then ask one or two of them to read out their descriptions. Teacher can also leave this part as homework. Step Ⅳ Vocabulary and Speaking In this part help the students master the rules of reading English numbers. There are 3 tasks in this step: Task 1, Activity 1。 Task 2, Activity 2。 Task 3, Activities 3 and 4. Task 1: Activity 1 T: Today we’ ll learn how to read some English numbers. Please look at Screen 1, Part A. There are some numbers on it. Find the rules and then work in pairs to read them correctly. Screen 1: A 2 20 200 2,000 20,000 200,000 2,000,000 20,000,000 200,000,000 2,000,000,000 B 1 22 123 1,234 12,345 123,456 1,234,567 12,345,678 123,456,789 1,234,567,890 Several minutes later. T: Do you find the rules of these numbers? S1: It seems that three zeros are used as a unit. T: Right. How do you read 20,000? S1: Twenty thousand. T: How about 200,000? S1: Two hundred thousand. T: How about 2,000,000? S1: Two thousand thousand. T: I’ m afraid you are wrong. It should be two million. S1: Sorry, I fet it. T: OK, how about 20,000,000? S2: It’ s twenty million. T: Right. How about 200,000,000? S3: That’ s two hundred million. T: What about 2,000,000,000? S4: That is two thousand million. T: Right. This is the way that English numbers are read. American would like to read like this: two billion. You did very well. Sit down, please. Now, let’ s look at the screen. Here is the ways we。