教学设计
本节课是一节阅读课，设计过程如下：导入引出克隆这一话题--- 掌握段落大意（略读）---课文内容填空（精读） ---讨论---巩固---写作拓展。教材里本单元内容，语言技能和语言知识都是围绕“克隆”这一中心话题设计的。具体涉及“什么是克隆”, “克隆羊多利是如何诞生的”， “克隆的利与弊”等。教师可在充分利用教材资源的基础上，结合学生的实际情况设计教学活动，旨在帮助学生有效地掌握阅读技巧，形成有效地学习方法和阅读策略，同时了解说明文篇章结构和写作特点，为下一步进行议论文的写作教学做好准备。本节课主要设计了以下几个教学活动：
Step 1.课前预习案。 课前的预习主要包含两方面，一是重点单词，短语和句型，二是话题链接，我们在阅读话题为cloning的文章时，首先应了解克隆的相关知识。具体内容如下：
【课前预习案】
Important words
1.直接的, 坦率的____________ 2.从事，承担_____________3.任意的__________
4. 获得，赢得__________ 5.禁止，不准______________ 6.积累，聚集___________
7.打扰，操心_________ 8.缺点，不利条件_________ 9.规则，规章_____________
10.不同，相异 vt______________, adj_______________,n___________
11.反对，不赞成vt___________,n._________adj客观的，真实的________________
12.退休，离开vi__________ n.____________ adj________________
13.假定，设想 vt__________, n._____________
14.改正，修正vt__________,n.____________
15. 抵抗，抵制vt__________, n._____________ adj__________________
16.理由，原因n.____________,adj_____________ adj(反义词)_________________
Important phrases
1.取得成功，偿清___________ 2.感到失望，沮丧______________
3.赞成，支持____________4.归功于__________ 5.一定做，注定做______________
6.使......刻骨铭心______________7.使复活______________
8.白费力气________________ 9.情况好/坏___________________
10.一方面......另一方面......___________________________________
Important sentences
1. Cloning plants is straightforward while cloning animals is very complicated.
2.On the other hand, Dolly’s appearance raised a storm of objections and had a great impact on the media and public imagination.
知识链接】
1．What’s cloning?
A clone is an animal or plant produced naturally or artificially from the cells of another animal or plant and is exactly the same as it.
Cloning is a way of making an exact copy of another animal or plant. The clone has the same DNA as the parent.
Usually，there are two kinds of cloning: Natural clone and Man-made clone.
Natural clone is one that occurs in nature without human help. For example, A strawberry plant
Man-made clone is one that is produced through human intervention (介入). For example, Dolly the sheep
2. How is a clone produced?
This happens in plants when gardeners take cuttings from growing plants to make new ones, and when small parts of a plant are taken and gown in a laboratory. It also happens in animals when twins identical in sex and appearance are produced from the same original egg.
3. What animals have been cloned?
Scientists have been cloning animals for many years. The creation of Dolly is the first mammal cloned from the cell of an adult animal. Since Dolly, researchers have cloned a number of large and small animals including sheep, goats, oxen, mice, pigs, cats, rabbits and so on. All these clones were created using nuclear transfer technology (细胞核移植技术).
Say T or F to the following statement
1. Growing new plants is natural clone while twins is man-made clone. 
2 The sheep, named Kitty was the first successful clone of a mammal
3.Since Dolly, researchers have cloned a number of large and small animals
  including cats, rabbits and horses.
4.A parent can clone a child who is dying of a terminal illness (不治之症). 
方法指导：
我们在阅读话题为cloning的文章时，首先应了解克隆的相关知识。
阅读左边内容，完成后面的练习。
Step 2：课内探究案。课内探究部分主要集中在读和写上面，读写结合，读是知识的输入，写是知识的输出。读的活动设计包括导入，速读，细读。写的部分先小组讨论，然后再落实在卷面上。具体活动设计如下：
1.lead-in
First look at two pictures and introduce the topic. Then ask a question: Do you think it is hard and tiring to study everyday? Do you want to clone yourself to help you do your homework? 用学生比较感兴趣的话题由此来提高参与学习的兴趣。
2. Fast reading
Task 1 Prediction:  What does the title mean?
______________________________________________________________
Task 2 Skimming 
Read the passage quickly to divide the 5 paragraphs into 4 parts and match them with the
main idea.
  Para. 1              A. People’s reactions to cloning
  Para. 2              B. Definition of cloning
  Para. 3              C. Uses and procedure of cloning
Para. 4              D. Problems and impact of Dolly
Para. 5 
（整体感知文本）一般说来，在阅读有标题的文章时，首先尽可能的发挥你的想象力，根据标题猜测一下文章的内容,，然后通过快速浏览每段主题句（一般在句首），抓住段意，再根据每段大意概括文章的主旨。最后回头看看你的预测。
3. Detailed reading
Task 3  Read the passage carefully and answer the following questions
(para1)1.What is cloning?
______________________________________________________________
2.Cloning happens in plants and ________.It includes _________ clones and man-made clones.
(para2)1.What are the two major uses of cloning?
______________________________________________________________
______________________________________________________________
2.How many female sheep were needed when cloning Dolly the sheep?
______________________________________________________________
______________________________________________________________
3.Pair work：How to produce a sheep?
(paras3-4)1.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.
2.Dolly’s appearance raised a storm of ________ and a great ______ on the media and public imagination.
(para5) clonePeople’s reactions to cloning(ambitious, negative, moral, positive, nervous and conservative)
Evil  leaders  ____________________
Religious leaders___________________
Governments  ____________________
Some countries___________________
China  _____________________ 
(领会文本细节）
在整体感知文本材料之后，细读文章重点内容。用心细读文章，认真思考左边的问题，用自己的话回答左边的问题。通过回读、查读等方法，概括、推理、判断相关的细节内容。
4. Task 4 Debate : Are you in favor of or against cloning?
Requirements:
Each group choose one opinion and try your best to give as many reasons as possible.
Use your facial expressions and body language to make your debate vivid.
（交流思想与看法）培养批判性思维，对克隆有一个自己的认识

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