Unit 4 Save the trees（More practice：The Amazon Rainforest ）导学案（无答案）

Unit 4 Save the trees
More practice--- The Amazon Rainforest
一、学习目标
1. 语言知识：掌握词汇cover, square, spread, destroy, deforestation, decrease 短语、句型 be home to, because of, as a result.
2. 语言技能： ①能够在扫读和快速浏览中找到信息点；能利用图片和关键词复述文章内容；能理清句子结构之间的关系；能按照作者意图，续写文章内容
②能找准段落大意并分析文章结构
③利用该结构进行模仿写作
3. 情感态度：能认识到环境的重要性，认识到人类在其中的作用，从而作出积极的努力。
二、学习重难点
在理解课本阅读材料的基础上，分析、归纳该类说明文的结构，并进行模仿写作。
三、学习过程
Step 1Brainstorm :
Group presentation---introduce the Amazon Rainforest.(Pay attention to the numbers数字)
Step 2 Pre-reading:
Try a quiz.
1. Rainforests cover ___________ of the earth.
A. 6% B. 7%
2.Rainforests are home to ____ of the world’s animal and plant species(物种) ?
A. half B. one third
3.The Amazon Rainforest lies in the Amazon Basin, ______.
A.South Africa B.South America
4.It’s the _____ rainforst in the word.
A.largest B. second largest
5.It is ________________ square kilometers.
A.5 million B. 5.5 million
6.. Why is it wet and warm there?
A. Because it’s near the equator(赤道). B. Because there are lots of trees.
Step 3 While-reading:
First-reading:Skim and scan to get the answers.(快速浏览，找到答案，读出句子和答案。)
2.Second-reading
1)Para. 1 Shadow reading (read with it)
Retell Para. 1 by using the key words and pictures below. (利用所给图片和关键词复述该段。)
2)Para. 2 Shadow reading
Find out the relationships(关系) between each sentence and match them.(找出句子之间的关系并连线，然后说出你做出判断的依据---单词或者词组。)
Sentences Relationship Key words/phrases
3)Para. 3 Read it aloud with your emotion(感情).
Discussion and continue-writing(讨论、续写第三段): How to try our best to protect it?
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Step 3 Post-reading
Complete the main idea of each paragraph. 完成段落大意
Get the structure of this kind of exposition. 总结该类型(环保)说明文的结构
Step 4 Imitate-writing(模仿写作)
Introduce the Huangjiao River with some pictures.
Present more information, ask Ss to select them into correct paragraphs. Then write an article by using the structre and expressions(利用结构导图和表达提示进行模仿写作).

The Huangjiao River
Length: 1200 meters
flow(流动) from the Pearl River into the Dongjiang River
Expressions:
however/as a result/ because/ because of…
cover/spread/be home to/destroy/the number of/ decrease/do our best to…
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Step 5 Summary
Learnt about the article_______________________________.
Learnt how to analyze and conclude the ___________ of an exposition on protecting environment.
Learnt how to write an exposition by using the structure.
Step 6 Homework