1.T: The population problem is the biggest one in China.

Now let’s discuss the question:

What are the problems of China’s population?

(学生小组讨论。)

T: Who can talk about it? (学生可能要说的很多，但有些语言他们表达不清楚，教师加以引导，尽量用简洁的语言表达清楚。)

S1: The population is still rising.

S2: The people in the countryside can’t obey the one-child policy.

S3: There are more and more old people in some big cities.

T: Very good. But what do you think of the future of China’s population? Please discuss it.

(鼓励学生不用举手，自觉站起来表达自己的观点。)

S4: The population of China will be 1.5 billion in 2050.

S5: Maybe China will have a population of 1.2 billion in 2050.

(学生可能做出种种猜测。)

3.T: Now I think you can read the numbers quickly. Let’s look at the population graph of 2005, then practice dialogs with your partners according to the example.

(教师用幻灯片或多媒体课件呈现教材3的图表。)

For example:

S7: What's the population of the world/China/India…?

S8:　 The world/China/India… has a population of…/

The population of the world/China/India…is….

(同学们充分练习后，让几组同学做示范。)

G1: …

G2: …

G3: …

Step 5　 Project　 第五步　 综合探究活动　 (时间:5分钟)

2.T: Let’s play a number game. I will show you some numbers. Read them quickly and correctly in groups. The group that can read the most quickly and the most numbers is the winner.

(教师在幻灯片上呈现几组数字，学生以小组为单位进行抢答，两位同学做记分员，读的最多最快、最准确的为胜者。)

(类似这样的数字至少要准备三组。)

(教师在黑板上画出计分表。)

(让学生统计得分，自主地构建形成性评价机制。)

T: OK. G₁ gets… G₂ gets… G₃ gets… G₄ gets… so… is the winner. Congratulations.

1.T: Look at the pictures of 2 and describe it.

(让学生通过自己的猜测，用所学过的语言知识把图片描述一下。教师可以先提问程度稍差的同学，目的是复习较大数字的读法并把新旧知识结合起来。)

S1: Picture 6　　 The jacket costs ￥326.00.

S2: Picture 2　　 It’s 6 575 miles away from Beijing to Toronto.

S3: Picture 1　　 The mountain is 8 844.43 meters high.

S4: Picture 5　　 The population of China is 1.3 billion.

S5: Picture 4　　 I think the population of Anhui Province is 59.9 million.

S6: Picture 3　　 The animal lived 210 million years ago.

T：Yeah, very good. You are great. Now let’s listen to the tape of 2 and number the pictures you hear.

T: OK, let’s check your answers.

(教师核对答案。)

Step 1　 Review　 第一步　 复习　 (时间:14分钟)

1.检查上节课教师布置的探究性作业，组织学生互评，教师选出若干份点评。)

T: S1, you did well. S2, excellent…

录音机/多媒体课件/幻灯片/小黑板

3.Learn how to read the numbers.

2.Go on learning the present perfect：

(1) The population has increased a lot.

(2) Chinese medical care has improved because our country has developed a lot.

1.Master some new words and useful expressions：

increase, rise, medical, medical care