Using LanguageⅡ优质公开课教案

Unit 2 Cloning 教学设计

------A sample plan for Using language 教师：江西瑞金一中

陈俨方

年级：高二

课题名称：新人教版-英语-选修8 Unit2 Cloning Using language

教学内容：Using language

教材分析

本单元的中心话题是“克隆”。本课例是高二第二单元的Using language部分。阅读部分主要围绕“克隆恐龙”展开，具体介绍人们对克隆恐龙的极大兴趣以及列举无法克隆恐龙的原因。本篇课文旨在训练学生阅读技能的基础上了解克隆这门生物技术以及正确认识有关的现实问题，引导学生如何正确利用好克隆技术来服务人类。

三维目标

Teaching aims: Knowledge aims: 1. Get students to learn the following words and expressions: strike…into one’s heart, bring back to life, initial, in vain, resist, merely, drawback, feather, in good condition, claw, adore hatch. 2. Let students to learn about the impossibility of cloning the dinosaurs. Ability aims: 1. Develop students’ reading ability and let them learn different reading skills; 2. Enable students to write a short passage by discussing in groups. Emotional aims: 1. Arouse students’ awareness of protecting endangered animals;

2. Develop students’ sense of competition and cooperation; Teaching important and difficult points: 1. Get students to know about the impossibility of cloning dinosaurs and its reasons; 2. Get the students to learn different reading skills; 3. Improve students’ writing skills;. Teaching methods: 1. Task-based teaching and learning 2. Cooperative learning 3. Discussion Teaching aids:

1. The app Focusky and the Internet; 2. Other normal teaching tools. 教学步骤

Teaching procedures: Lead-in Fast reading Careful reading Discussion Writing Summary

Step1: Lead-in

Enjoy the sound and some pictures. And then ask the following questions:

1. “What are they? Where can you see them?”→2.“Why can you only see them there?”→3.“How much do you know about the species?”→4.“What would you expect them to do?”→

5.“Is there any possibility that dinosaurs can return?”

【设计说明】: 通过展示一些图片和声音让学生思考一系列问题，很自然引出是否能够“克隆恐龙”这个话题。

Step2: Fast reading

Ask students to skim the title and read the text quickly, and then finish the following tasks: 1. Why is the “?” used in the title? ________________________________________. 2. What’s the main idea of each paragraph? Para.1

Introduce the _________ of the passage Para.2

Explain the __________ for the impossibility of cloning dinosaurs Para.3

Conclude it’s just ____ _______. 【设计说明】:通过快速浏览课文标题和文章阅读部分，让学生快速获取文章基本信息。

Step3: Careful reading Let students read the text carefully paragraph by paragraph and then finish the following tasks: Para.1 (Topic) 1. Why is the film Jurassic Park mentioned in the text? ____________________________________________________________. 2. Would it be possible to clone extinct animals? ____________________________________________________________. Para.2 (Reasons) 3.

Why is it impossible to bring extinct dinosaurs into life through cloning?(Three key words) ______________________________________________________________. Para.3 (conclusion)

4. ____ _____what we know now, animals extinct _____ _____ 10,000 years can’t be cloned, _____ dinosaurs disappeared ________ years ago. So…

【设计说明】:在完成快速阅读后，让学生分段仔细阅读。各段的题目牢牢扣住各段中心词“Topic”

“Reasons”

“Conclusion”来进行设计。问题始终贯串在一条直线上。让学生快速、准确把握整篇文章的意思，同时运用不同的阅读技巧来理解文章，从而提升学生的阅读能力。

Step4: Discussion

1. Before discussion, ask students to think about a question“

What factors should be included to clone other extinct animals?” , and then let them choose one animal to clone and list at least three reasons.

2. Show the example of the dodo bird to the students.

1775→DNA is in good condition

Reason1 A kind of birds→ increase diversity group of birds

Reason2 Hot climate

→

appropriate…warmer…weather

habitat Reason3

Large eggs and tasty meat→ nutritious, enjoy, sell

benefits Reason4 …

?→Reason1,2,3…

?→Reason1,2,3…

?→Reason1,2,3…

3. Ask students to report and then sum up some reasons for cloning them.

1. Perfect DNA; 1.DNA is in a good 1.DNA is in a good 2.Appropriate to warmer condition; condition; climate now; 2. Suitable habitat 2. Enough grassland

3. Increase diversity in the 3.

Expand the diversity in 3. Increase diversity in the group of zebras the group of ducks group of cows 4.Skin as decoration; 4. Useful for protecting 4. Large and strong, help 5. Taste delicious meat; clothes for water; plough the field; …

5. Farmers keep it as ducks to 5.Thick hair made into

earn money; clothes;

…

6. Long horns used for

decoration;

…

【设计说明】:在让学生讨论前，先抛出一个问题让学生思考：克隆已灭绝的动物应该考虑哪些方面的因素？目的让学生结合阅读中所提到原因以及让学生进一步思考还需要考虑哪些因素。然后让学生分组讨论哪种已灭绝的动物值得克隆并且给出原因。由于这个活动对于他们来说有难度，所以先举了一个关于克隆渡渡鸟的例子来帮助学生。汇报的时候采用抢答的形式，学生情绪高涨，课堂气氛也很活跃。

Step5: Writing

1. After showing reasons for cloning animals, let students write a short passage according to what they have discussed, and meanwhile show the sample to the students: Let’s bring the dodo back to life The dodo is the most suitable animal to bring back to life. Here are the reasons. First of all, it’s friendly and harmless, so there is possibility that children would adore it and make it an ideal pet. Besides, not only can people enjoy its large notorious eggs, but also farmers can sell its feathers as decoration. Most importantly, the dodo bird became extinct fairly recently, making its DNA still in a good condition. In conclusion, I think the dodo bird would be the best choice to bring back to life for pleasure and for food. 2. Ask some to present their writing. 【设计说明】: 让学生把刚才讨论的各种克隆动物的理由组织成一些较好的句子和一篇较好的短文。为了鼓励他们使用较好的句子结构等，先展示一遍范文。通过这个活动来引导学生把所学语言运用到具体实践中，从而提升学生的写作能力。

Step6: Summary Ask students the question〝What have you learned in this class?〞to encourage them to summarize something. 【设计说明】: 让学生回顾和总结本节课所学内容，鼓励学生进一步思考一些问题，从

而唤醒学生保护动物尤其是濒危动物的意识并行动起来。

Homework Writing task:

书面表达

在英语课上你们班对四种灭绝的动物（渡渡鸟、原牛、大海雀、白氏斑马）中最值得克隆一种动物展开了热烈的讨论。以下图表是其讨论结果，请结合图表内容写一篇文章介绍讨论情况并发表自己的看法。

内容包括：

1. 介绍图表信息；

2. 分析其原因；

3. 谈谈你的看法。

注意：词数100左右。

1.6%32.832.8AurochsGreat aukQuaggaDodo bird32.8%

克隆四种动物的赞成人数百分比（%）

【设计说明】:让学生写一篇有关克隆的已灭绝动物的小短文来巩固和延伸本节课知识内容。