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

2.Homework:

(1) Find out your family photos of the past and the present. Talk about them and write an article of 100 words.

(2) Talk about the problems around you because of too many people.

Section B

The main activities are 1a and 3. 本课重点活动是1a和3。