必修3Unit 4 Astronomy说课稿
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1 必修3Unit 4 Astronomy: the science of the stars说课稿
The First Period
Extensive Reading and Writing
一、教材内容分析
人教版高中英语课程标准必修三有五个单元，每个单元围绕一个主要话题开展听、说、读、写活动，本节课的话题是“How life began on the earth”。
二、课题
高中英语新课程标准必修3 Unit 4 Astronomy: How life began on the earth
第一课时Extensive Reading and Writing
三、本课时的新课标理念
新课标强调学生在参与、实践、讨论、探究和合作中学会用英语来表达、交流、发展综合语言运用能力。
课堂上主要运用小组讨论、引导法,归纳法 “任务型”活动和多媒体辅助教学等各种方法组织指导学生完成各项阅读任务和写作任务，在学习过程中经过实践、探究，理解，形成概念，初步运用，巩固等环节，强调发挥学生的自主意识,以达到新课标对学生能力的要求。
四、教学重点
1. 让学生对文章有整体把握并了解How life began on the earth
2. 学习一些阅读技巧。
3 先输入再输出，培养学生获取信息和处理信息的能力。
五、教学难点
1. 培养并提高学生的阅读能力
2. 让学生表达自己的观点
六、教学方法
1. 合作学习
2. 小组讨论
3. 任务型教学与学习
七、教具
多媒体及其它常规教具
八、教学目标
1. 知识目标
a. 让学生掌握本单元的词汇和表达
b. 让学生了How life began on the earth
2 2. 能力目标
a. 培养学生的阅读能力
b. 让学生表达自己的看法
3. 情感目标
a. 增强环保意识。
b. 培养学生的合作精神
九、教学过程设计
Step I Warming up
Watch the video
Step II Pre-reading
Using pictures
Step ⅢReading
Task1 Skim the passage and complete the following exercises.
How does the author develop the passage?
A. Give examples（举例）
B. In time order（以时间顺序
C. Comparison（比较
What’s the writing style of the text?
A. Narrative 记叙文
B. Explanation 说明文
C. Essay 散文
Task2:Scanning
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.
Why did the plants grow before the 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.
3 D. It was easier for plants to grow.
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.
Task3:Careful reading
1.Match the main idea with each paragraph.
Para. 1 A.The formation(形成) of the earth.
Para. 2 B.The importance of water for life.
Para. 3 C.A widely accepted theory –the Big Bang
Para. 4 D.The arrival of humans and their impact on the earth.
Para. 5 E.The development of plants and animals on the earth.
Step ⅣListening and thinking
Task1 Listen to the tape and try to understand how human beings begin.
Listen to the tape for the students to follow and have further understanding of the
passage.
How life began on the earth
water 1 small plants in water
2 shellfish and all sorts of fish 3 green plants on land
6 forests
7 reptiles (on land)
8 dinosaurs (on land)
9 mammals (on land) 10. small clever animals
with hands and feet
11. human 4 insects(on land)
5 amphibians(on land and in
water)
4
Task2 Text Retelling
Retell the text using about 100 words.
Main Idea
Through the writer’s clear description, we know that how life began on the earth. It’s
a long and slow process. From the passage, we know that earth is the best place for
human to live on. But humans didn’t take good care of it in the past. Now we are
facing many environmental problems now. What should we human do? Everyone who
reads the passage will think about this problem. We should pay more attention to
taking care of our earth. Taking good care of the earth means taking good care of
ourselves.
StepV discussion
The earth is our only one home.Are we taking good care of the earth? What
problems are humans causing ?(from the last paragraph.)
Report your discussion
Problems of the earth:
1.
2.
3.
Things we can do for the earth:
1.
2.
3.
Step Ⅵ Writing
Structures and Patterns
Para 1. The earth, the only mother of human beings, is now facing a … problem
Para 2. Therefore, we must take measures to prevent the earth from being
polluted. First of all, we should… Besides, … What’s more… . In
addition, …
5 Para 3. We have only one earth. We should…
Step VII Homework
Make a poster about protecting the earth with your group members
十、板书设计
Report your discussion
Problems of the earth:
1.
2.
3.
Things we can do for the earth:
1.
2.
3.
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