Using LanguageⅡ教学目标

Book 3 Unit 4 Reading How Life Begin on the Earth 教学设计

教学目标：

1. 让学生了解地球的形成和发展

2. 让学生体会并掌握各种阅读技能和技巧

3. 通过文章学习使学生认识地球对人类的重要意义，增强保护地球的意识。

教学重点和难点：

1. 通过阅读了解地球的发展历程

2. 掌握不同的阅读技巧，提高阅读能力。

教学过程：

Step 1. Lead-in

Think about these questions and discuss them with your partner. 1. Do you know how many planets circle around the sun in our solar system?

2. What are they? Can you match the names with the planets? Mercury

Venus

Earth

Mars

Jupiter

Saturn Uranus

Neptune 设计说明：通过了解太阳系及其构成，使学生对天文学有初步了解并产生兴趣。

Step 2 Pre-reading

Each religion and culture has its own ideas about how life began on earth. What do you know?

设计说明：通过讨论生命起源的传说让学生产生了疑问，地球是怎么形成的，顺利过渡到下一部分。

Step 3 Reading 1. Read the passage quickly and find out the main idea. a. How life began on the earth. b. The formation of the earth. 设计说明：培养学生通过快速阅读，把握文章大意的能力。

2. Match the main idea with each paragraph Paragraph1

a. The importance of water for life

Paragraph2

b. The development of plants and animals on the earth

Paragraph3

c. The formation of the earth

Paragraph4

d. A widely accepted theory about the formation of the universe Paragraph5

e. The arrival of humans and their impact on the earth 设计说明：在上一活动的基础上，通过此连线题进一步考察学生在规定时间内把握语篇大意和各段中心大意的能力。

3.

Put the order of development of life into a timeline.

A.

Insects and amphibians appeared. B.

The earth became a solid ball. C. Reptiles appeared. D. The earth was a cloud of dust. E. Shellfish and other fish appeared F. Dinosaurs appeared.

G. Small plants grew on the water. H. Plants began to grow on dry land. I. Water appeared on the earth. J. Mammals (including humans) appeared. ________________________________________________________ 设计说明：在学生对文章的内容已经有了比较全面的了解后，了解生命起源的时间发展顺序。

4. Reading comprehension 1. Why was the earth different from other planets? A. It produced a lot of heat.

B. The water remained. C. Water disappeared.

D. It was the oldest planet. 2. Why was life able to develop on the earth but not on other planets? A. The earth had a solid shape.

B. The earth did not have harmful gases in its atmosphere. C The water stayed on the earth but not on other planets.

D. The earth was not too hot and not too cold. 3. Why did the plants grow before animals came? A. Animals needed plants to protect them from the sun.

B. Plants provided oxygen for animals to breathe.

C. Animals could hide from hunters in forest. D. It was easier for plants to grow. 4. What problem is caused by human beings? A. They exist everywhere on the earth. B. They cause global warming. C. They find new methods of growing crops. D. They enjoy hunting and fishing. 设计说明：培养学生寻找细节信息和推理判断的能力。

Step 4 Summary. Try to retell the whole passage ________ made it possible for life to begin to develop. Plants encouraged the development of _____________________________. Later_____________ appeared. When plants grew into forests, _________ appeared for the first time. Some huge animals, called _________, developed. When dinosaurs disappeared, _________ became more important. ________ came into being and spread all

over the world. 设计说明：在学生对文章的内容充分掌握后，培养学生的口头表达能力。