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人教2003课标版《Using LanguageⅡ》精品教案优质课下载
（一）学生难度预测
作为高二年级的学生，虽然完成了课本阅读部分的学习，积累了话题写作的一些短语及结构，但是无法在写作中有效输出，教师需要创设情景，鼓励并引导学生在话题写作中使用相应的短语及结构。
（二）语言材料分析
本课时是人教版选修6第4单元“Global warming” 的写作课，充分运用“i-1”语言材料选材原理，选用外研社版必修3 Module 4 Sandstorms in Asia中“reading and vocabulary”以及北师大版选修8 Unit 22 Global Warming和Natural Disasters中的文段整合成一节写作课。让学生阅读相关话题的语篇，探究表达因果关系的短语及结构，然后通过mini-speech的口语活动展开话题讨论，最终完成作文“Save the earth, start from me”。
（三）教学目标
1.引导学生通过阅读语篇，分析段落和语句，找出表达因果关系的方式。
2.鼓励学生勇于表达自己的观点，让观点具有说服力。
3.培养学生的逻辑思维的思辨能力。
（四）学习目标
1.学生能够阅读语篇，分析段落和语句，探究表达因果关系的方式。
2.学生能够在演讲和写作中表达观点和论证观点。
3.学生能够学会应用相关词汇、结构及句型来表达因果关系。
（五）教学过程
教学步骤：设计目的Step 1 Lead- in （见第3张幻灯片）
Get the students to share the sentences from the text concerning cause and effect and discuss about the expressions or structures which show cause and effect
1. All scientists subscribe to the view that the increase in the earth's temperature is due to the burning of fossil fuels like coal, natural gas and oil to produce energy.
2. It means that more heat energy tends to be trapped in the atmosphere causing the global temperature to go up.
3. They also agree that it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide.
4. On the one hand, Dr Foster thinks that any trend in which the temperature increases by 5 degrees would lead to a catastrophe.
5. On the other hand, George Hambley states, "More carbon dioxide is actually a positive thing. It will make plants grow quicker; crops will produce more; it will encourage a greater range of animals — all of which will make life for human beings better."
Step 2 Reading （见第4-5张幻灯片）
1. Get the students to read four paragraphs to find more sentences concerning cause and effect and discover the expressions and structures used to show cause and effect
Paragraph1 （北师大版 Unit 22, Lesson 1）
①Over the last 100 years, the global average temperature has increased by 1°F and many experts insist that the blame for this global warming can mostly be pinned on human activities. ②As a result of increased industry, agriculture, the cutting down of forests, the increase in transport and the burning of fuels, nearly 6 tonnes of carbon dioxide goes into the atmosphere every year for every one of the earth's 6 billion people. ③The amount of carbon dioxide in the atmosphere has risen by more than 30% in the last 250 years with half of this increase occurring since 1960. ④Given this data, it seems that the link between human activities and rising global temperatures is not merely a coincidence.
Paragraph 2 （北师大版 Unit 22, Lesson 1）