选修八Unit2Cloning教学设计.doc

Unit2. Cloning
Reading 教学设计
-雷翊
Teaching contents,
Doing reading comprehension about the text
Teaching aims,
Knowledge aims，
Help the students understand the text very well.
Ability aims，
Improve the students’ reading ability.
Emotional aims，
1. stimulate students’ interest in cloning.
2. Develop students’ spirit of cooperation and teamwork
Teaching important points,
how to describe cloning.
Teaching difficult points,
Help the students analyze the writing techniques of the article.
Teaching methods,
1. task-based teaching and learning
2. debate method
Teaching procedures and ways,
Step1: Warming up
Show some pictures of A strawberry  plant 、Twins、cloning cattles、Identical dogs on the screen. Get students to look at the pictures and discuss:
Which is natural clone? Which is man-made clone? and then explain how they differ.
(设计说明：克隆技术是一门前沿科技，学生对此兴趣浓厚，利用幻灯片展示当今克隆技术产生出来的动植物照片，学生的兴趣被瞬间激发，这就为进一步的学习做好了铺垫。）
Step2: Lead-in
How was Dolly the sheep cloned?
What was its fate?
Step3.Fast reading
1. What is the main idea of the text?
The text is mainly about the_________ of animal cloning and the life of Dolly the sheep, as well as the reasons why cloning is still___________.
2. Give the right order of the main idea of each paragraph.
___. Cloning has two major uses.
___. What is cloning?.
___. The effect of Dolly the sheep.
___. It is forbidden to clone human beings.
___. The problems of Dolly.
（设计说明：通过快读课文，让学生试着找出每段的主旨句，这样学生能更好地理解每段大意以及整个课文的大意，下一步各个阅读练习就容易多了。）
Step4.Careful reading
Ⅰ.True or false
1. Electricity is needed in the procedure.
2. Sheep B provides a somatic cell for the clone.
3. The lamb is the exact copy of sheep A.
4. Cloning means making a copy of an animal.
5. Cloning animals is as complicated as cloning plants.
6. Dolly the sheep was the first successful clone of a mammal.

ⅡChoose the best answers.
1. The cloning of Dolly the sheep succeeded because____. A. it’s easier to clone a sheep than other animals B. the scientists were determined and worked hard with patience
C. the scientists were rewarded and got lots of money
D. many other attempts to clone mammals failed.
2. The lamb is the clone of the cell from sheep B because_____. A. it provides the egg cell
B. it gives birth to the lamb
C. it provides the nucleus
D. it is a female sheep
3. In the second paragraph, the word “straightforward” means ____.
A. uncomplicated B. honest C. frank D. difficult
4. Generally, an original sheep lives _____ years old.
A. 9 B. 10 C. 13 D. 6.5
5. It can be inferred from the passage that a cloned animal _____.
A. usually lives as long as the original one
B. usually lives longer than the original one
C. usually dies earlier than the original one
D. is usually as healthy as the original one
6. What about the writer’s attitude toward cloning in this passage?
A. The writer is against cloning.
B. The writer is in favor of cloning.
C. The writer does not state any personal opinion about cloning.
D. The writer is in agreement with cloning.
Ⅲ. According to the text, fill in the blanks.
Definition
It is a way of __________________ of another animal and plant.
2 major uses of cloning
1) to produce ___________quantities of plants.
2)It is valuable for research on new ______________and medical
research on ________.
Cloning procedure
Cloning plants is_____________while cloning animals is very ___________.
The first successful
animal clone
The cloning of_______________, a _____________ in cloning technology.
The problems of Dolly
the sheep
Encouraging news :
It seemed to develop ________ .

Disturbing news:
It lived for ____ and a half years, half the length of the life of the _______ sheep.
The effect of Dolly
The sheep
Its appearance raised a storm of ________ and had a great impact on the _____ and public___________.
It opened everybody’s eyes to the possibility of using cloning to cure _______________and even to produce _____________.
Arguments on cloning
Evil leaders hope to clone ___________.
Religious leaders raised ________ questions.
Many governments _______ research into human cloning. Some countries continued to ___________evidence of the abundant medical aid.
（设计说明：本节课始终围绕读，以Fast Reading, Careful Reading和Comprehening等多种方法渐进式导入学生去理解课文和解决课标阅读任务，课堂的循序渐进式阅读教学促使学生积极配合，受到了理解的学习效果。

Step5. Debate
Is cloning beneficial or harmful for us ?

Step6.Homework
1. Read the text again and mark out the useful words and expressions.
2. Finish Ex1﹑2﹑3 on Page12.

Step7. Reflection after teaching
1.由于学生的基础很差，阅读技巧的训练比较欠缺，而这篇课文又是一篇介绍克隆技术的说明文，学生理解难度大。根据这些特点，本节课我以精读和泛读为主，并鼓励学生多思考，多发言，增强他们的信心。
2.在阅读过程中删了一小部分题，是想给学生更多的阅读时间，可是课堂时间没有把控好，阅读量不够，不充分。应该对学生和课堂有更好的预设和准备。
4