高二英语选修8 Unit2 Cloning-Reading教学设计与反思

高二英语选修8 Unit2 Cloning-Reading教学设计与反思
朱义东
一. 教材分析
本单元以Cloning为话题，旨在通过单元教学，使学生了解克隆技术的优缺点，学会表达和支持个人观点，能用所学的有关Cloning的词汇去表述自己对这一新技术的观点和看法。

二. 教材重组
从话题内容上分析，Warming Up 与Reading相一致；而从训练目的上分析与TALKING比较一致。

从教材份量来说，可将Warming Up和Reading整合在一起，设计成一节任务型“阅读课（精读课）”。

三.教学目标Teaching goals
1. Target language目标语言
a. 重点词汇和短语
clone，commercial，producer，undertake，arbitrary，object，forbid，accumulate，cast down，object to，the media，in favour of
b. 重点句子
It is a way of….
The fact is that….
The question that occ urred is….
2. Ability goals能力目标
Enable the students to describe cloning: What is the advantages of cloning？ What is the problems or dangers of cloning？What is your opinion of cloning？
3. Learning ability goals 学能目标
Help the students learn how to describe cloning.
Teaching important points 教学重点
How to describe cloning.
Teaching difficult point 教学难点
Help the students analyze the writing techniques of the article.
Teaching methods 教学方法
Skimming, task-based method and debate method.
Teaching aids 教具准备
A recorder, a projector and some slides.
Teaching procedures & ways教学过程与方式
Step I Lead-in
Show some pictures of Dolly the sheep(多莉羊)、 A
strawberry plant(草莓植物)、 Twins（双胞胎婴儿）、 Identical dogs(克隆狗)的图片，on the screen. Get students to look at the pictures and discuss:
which ones are natural clones and which ones are man – made? Then explain how they differ.
S: I think the twins are natural clones and the Dolly sheep is man-made. T: You are right! Can you explain how they differ?
S: The twins were born at the same time, but the Dolly sheep is man-made.
T: Anything else? Who want have a try?
S: I think the identical dog is man-made.
T: Good Job
【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，注意力高度集中，学习的热情高涨。

这就为进一步的学习做足了铺垫。

Step II Pre-reading
Before class, ask the students to search for some information about this topic. Now show the questions on the screen, and then let them work in pairs and discuss about cloning. Ask the students to list the questions they want to find out and then share their lists with their partners.
Questions about cloning:
1. What is a clone?
2. How is a clone produced?
3. What benefits can humans gain from cloning?
4. What problems may arise when humans are cloned?
5. Should we clone human?
6. Could cloning replace sex as the means of creating new human life?
7. Could a parent clone a child who is dying of a terminal illness?
The teacher walk around the classroom and give some help if necessary. After a few minutes. Ask: What is the writer’s opinion about cloning? Say: I think many of you have questions, now let us read the article with the questions.
Suggest answers:
1. It is a way of making an exact copy of another animal and plant.
2. 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. It can help cure disease and can help couples who have no baby to bear
a new baby.
4. There may be more bad people like Hitler.
5. In my opinion, I do not agree, for it may cause many moral problems.
6. No. Because cloned human has the same quality as the real human, natural born baby’s quality is higher than his parents.
7. No. The cloned baby also has the disease.
【设计说明】Pre-reading是Reading的热身活动。

它要求采用与同学讨论交流的方式谈论有关克隆的相关知识。

设计一些令学生感兴趣又急于想知道的问题，不仅使学生增加了对克隆技术的了解，也为下一步的阅读打好基础。

Step III Reading ③
Get the students to comprehend the passage quickly and accurately and meanwhile help the students form a good habit of reading
1.Skimming
Ask students to tell the following statements are true(T) or false(F).① Cloning means making a copy of an animal or a plant. ( )
②Gardeners can make a lot of money by cloning plants. ( )
③ Cloning animals is as complicated as cloning pl ants. ( )
④Dolly the sheep is the first successful clone of a mammal. ( )
⑤Natural clones happen in animals as well as in plants. ( )
Suggest answers: ① F ② T ③ F ④T ⑤T
2. careful reading
Ask the students to read the text again and find out the main idea of each paragraph..
Para. 1 Cloning is a way of making an exact copy of another animal or plant.
Para. 2 Cloning has two major uses.
Para. 3 The problems of Dolly.
Para. 4 The effect of Dolly.
Para. 5 It is forbidden to clone human being.
【设计说明】让学生快速浏览课文，然后再仔细阅读，把培养学生的阅读能力落实贯彻到每一节的课堂教学当中。

Step Ⅳ Comprehending
Show the questions on the screen. Ask students to read the text again and find the answers to each questions.
【设计说明】授课中始终围绕读，以Listening and skimming,
careful reading和comprehending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，反映活跃，受到了理解的学习效果。

Step V Homework
Ask the students to do the following.
1. Complete the exercises on page 13.
2. Recite the key sentences in the text.
3. What is Cloning? You might not believe it, but there are human clones
among us right now. Have you ever wished you could have a clone of yourself to do homework while you hit the skate park or went out with your friends?
Imagine if you could really do that. Where would you start?
StepⅥReflection after teaching
由于学生英语基础比较薄弱，阅读技巧的训练比较欠缺，平时受到抑远胜于扬。

而Unit2 Cloning又是一篇介绍克隆技术的说明文，专业性强，文中生词多，学生理解难度大。

根据这些特点，本单元我以训练阅读技巧之略读和扫读为主，并鼓励学生多思考，多发言，增强他们的信心。

在教Reading部分，在课堂教学中我借助克隆相关图片，知识及Dolly的信息导入课文，再以复习生词进入课文。

授课中始终围绕读，重在培养学生阅读技能，以skimming，careful reading
和comprehending等循序渐进式的阅读教学方法，促使学生积极配合，收到了良好的学习效果。