Learning about Language教案1

Unit 4 Global warming（Book 6）

The earth is becoming warmer, but does it matter? 教学设计

刘凤霞

一、教学内容分析: 本单元的中心话题是人类当今面对的环境问题，主要探讨了“全球变暖”和“节约能源”等方面的问题。所涉及到的语法是it的用法。在此之前，学生们在第三单元学习了一部分it的用法，这单元将对it的用法进行更全面的学习。有助于学生们在高考中语法填空，改错，作文的得分。在高考题型中，阅读占了很大比重，因此我这节课的内容主要分为两部分：一部分是阅读与理解。阅读部分的材料是一篇杂志文章，主要讲述了地球升温的现象和原因。文章最后以开放性话题结尾要求读者思考：对于全球变暖我们人类要不要采取措施？学生通过查读、略读、细读的形式来理解全文，帮助学生进一步了解保护地球的重要性。第二部分通过观看视频，小组讨论的形式，引发学生思考表达自己的见解看法，在活动中运用所学知识创造性的使用语言，为后面的写作练习作铺垫。

二、教学三维目标描述：

知识与技能目标：让学生读懂文章内容，理清文章脉络，提高语篇能力和语用的能力。

情感与态度目标：

激发学习热情，培养学生用科学的眼光看待事物，关爱地球，关爱生命。

过程与方法：以学生为中心，教师起到辅助作用，通过独学，对学，小组讨论等形式寓教于乐，培养学生独立思考合作学习能力；

三、教学重点难点：1. 了解全球变暖的现象和原因

2. 让学生们用所给句子结构表达见解

四、教学过程: 分为课前预习，正课两部分

课前预习：

Task I: Choose the best answer: 1. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977?

A. Dr. Janice Foster.

B. Charles Keeling.

C. George Hambley.

D. Sophie Armstrong. 2. Which of the following is Dr Janice Foster’s opinion?

A. The result of the temperature increase will be serious. B. The amount of warming is nothing serious.

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C. We needn’t worry about high levels of carbon dioxide.

D. Global warming is a natural phenomenon. 3. Which of the following is TRUE according to the text? A. The temperature of the earth increased about one degree Fahrenheit during the 20th century. B. The carbon dioxide content in the air increased by 70 parts per million from 1957 to 1997. C. All scientists accept the data in graph 2 except Charles Keeling. D. Janice Foster says that more carbon dioxide will make plants grow faster. 4. The author probably agrees that ________ A. actually global warming is good for man. B. we should do nothing about the global warming. C. catastrophes will happen if the globe keeps on warming. D. a lot remains to be found out about the effects of global warming. Task II：

Skim the passage, and match the main idea with each paragraph.

I (1)

(A) Explain how global warming comes about. II (2-3)

(B) Introduce a debate over global warming. III (4-8)

(C) It’s up to readers to think and decide whether people should do something about global warming or not. IV (9)

(D)List two different attitudes among scientists towards global warming. Task III: Find the following phrases in the text. 1. 发生，造成___________

2.毫无疑问______________ 3. rather than_______________

4.自然现象______________ 5. 同意，赞成______________

6. due to_______________ 7. 化石燃料________________

8.上升，上涨_________ 9.二氧化碳________________

10.导致___________ 11.一方面__________________ 另一方面___________________ 12.反对____________________

12. build up______________ 设计意图：采用独学的学习方式，独学重在冷静思考，让学生带着问题有针对性的理解文章中几个关键而又易于判断的问题。激发学生深入阅读的兴趣和信心，便于学生抓住文章主要信息。（学生质疑，同学教师答疑）

正课教学步骤：

Step1: Lead-in: Show pictures of a greenhouse and introduce what is made of and used for. Tell students how it works. 由温室逐步引入全球变暖，让学生思考温室有助于植物生长，全球变暖有益于人类生活吗？从而引出本节课的主题

The earth is becoming warmer, but does it matter? Step2: 明确学习目标。学生高声朗读学习目标，让学生明确本节课所要达到的目标。

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Step3: 自查自纠。

展示课前预习的答案。

设计意图：采用两两对学、同桌商讨的形式快速核对答案，解决问题。真正实现兵教兵、兵练兵、兵强兵。

Step 4：课内探究

【探究一】

Task I Read the text quickly and find the answer to the questions: 1. Who wrote the magazine article? What is the name of the magazine?

2. What are the names of the three scientists mentioned in the article?

3. What are the effects of global warming?

Task II

Fill in the blank according to the text. Phenomenon The temperature of the earth rose about one degree Fahrenheit during the 20th century. ★ It is [2]______________that has caused the increase in the earth’s temperature through the burning of fossil fuels like coal, natural gas and oil to produce energy. ★

Carbon dioxide，methane and water vapour can [1]_________ [3]________ heat from the sun to warm the earth. The problem begins when we add huge [4]______________ extra Carbon dioxide into the atmosphere. ★ The carbon dioxide in the atmosphere went up from 1957 to 1997. The burning of more and more fossil fuels has [5]_____________the increase in carbon dioxide. Scientists who agree with Dr Scientists who agree with Different Janice Foster George Hambley [6]_________An increase of five degrees More carbon dioxide is towards the would be a(n) actually a(n) [9]________. increase in [7]____________.They think It can make plants grow carbon there may be a rise of the sea faster; crops will produce dioxide level, or [8]__________severe more. In a word, all of storms, floods, droughts, the these will make human spread of disease, and so on. begins live better.

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The climate of the earth is going to keep on warming Result [10]_______ we begin to reduce the amount of greenhouse gases. 设计意图：细读部分采用小组讨论的形式完成表格，有助于梳理文中的信息，培养学生查寻摘记主要信息的能力。群学是以解决问题为主，学生开展有效的合作、探究、对子帮扶、真正实现兵教兵、兵强兵、兵练兵。

Step 5 【能力提升】Discussion and speaking

The earth is becoming warmer, what should we do to solve the problem?”

a) In order to solve the problem, we can…

b) In my opinion, I think…

总结归纳：In order to solve the problem(In my opinion), we can…

_________________________________________________________________________________________________________________________________________________________________________ 设计意图：这一环节属于知识输出的环节，有助于提高学生的表达能力。同时也对学生进行了一个情感提升：唯有行动生命才有希望，让学生行动起来保护地球，保护环境。

Step6: Homework

模板一

A、

B层同学

1) “What will our future be like if the earth becomes too hot to live? （提出问题）

2)

How to solve the problem? （解决问题）

a)In order to solve the problem, we can…

b) In my opinion, I think…

模板二

C层同学

If people can’t stop putting too much co2 into the air, the temperature/ the sea level will become____________. Animals and human will_________.

In order to solve the problem (in my opinion) I think, we can______because _______in addition________. In a word, we must_________.

设计意图：根据文章讨论的内容，让学生们写一篇短文。A B层同学可以用模板一，A层同学也可以自由发挥。C层同学用模板二，基本句子结构给出，以填空形式写一篇短文，C层同学也可以挑战模板一。分层作业可以兼顾各个层次的学生，让不同层次的学生可以找到学习的自信，喜欢学习，从而有所收获。

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