3. China has the largest population in the world.

2. The world’s population is growing faster and faster.

1. Every minute about 261 babies are born in the world.

1. (教师展示人才市场的图片或多媒体播放春节前各大银行排队取钱的画面，并给出一些材料，引出1a。)

T: Just now, we have known the world has a large population. Now, look at the picture and listen to my materials about population.

2. (多媒体展示世界各国人口图表，复习Section B中重要句型。)

T:　 You have mastered how to say these numbers. Now look at the chart and review what we’ve learned in Section B. What’s the population of the world?

Ss: It is said that the world has a population of 6.5 billion.

T:　 Which country has the largest population?

Ss: China has the largest population with 1.3 billion.

T:　 Is the world’s population increasing now?

Ss: Yes, the world’s population is increasing by 80 million every year.

T:　　　 It really is one of the greatest problems today. I think we should do something to solve this problem.

Ss: Yes.

Step 2　 Presentation 第二步 　呈现(时间:12分钟)

Step 1　 Review 第一步 　复习(时间:10分钟)

1. (用添加数字的方法复习高位数字，使学生由浅入深地掌握知识。操作：教师首先在黑板上写出一个两位数，然后逐次在后面加上一个数字，被提问的学生由基础较差的向基础较好的依次递进。)

T:　　　 I’ll write numbers like this “88-888-8888, … -8,888,888,888”. Say these numbers as quickly as you can, clear?

Ss: Yes.

T:　 88.

S₁: Eighty-eight.

T:　 888.

S₂: Eighty hundred and eighty-eight.

T:　 8,888.

S₃: Eight thousand, eight hundred and eighty-eight.

T:　 8,888,888,888

S₃: Eight billion, eight hundred and eighty-eight million, eight hundred and eighty-eight thousand, eight hundred and eighty-eight.

…

录音机/多媒体/小黑板/图片

3. Get students to know how serious the world’s population problem is.

2. Talk about the problems the overpopulation brings about:

　 (1)It’s difficult for lots of people to find jobs

　 (2)…, we are short of energy and water.

　 (3)Most cities are more crowded than before, and the traffic is much heavier.

1. Learn the new words and useful expressions:

difficulty, be short of, so far, percent, offer.