八年级上册Unit 4 Our World Topic 1 Section C备课教案
The main activities are1aand2a. 本课重点活动是1a和2a。
Ⅰ. Teaching aims and demands 教学目标
1.Learn some new words and phrases:
cover, earth, surface, thousands of, dark, forest, control, wood, rubber, protect, main, fact, in fact, make up, lake, sea, ocean, drop, on earth, hole, fill, fill … with …, dig, deep
2.Learn some useful sentences:
(1)Water is necessary for all plants.
(2)They can’t live at all without water.
3.Go on learning the comparative and superlative degrees of adjectives:
(1)The plants in the forests help to make the air fresher.
(2)But, now, rainforests are becoming smaller and smaller.
(3)Water makes up the largest part of the human body.
4.Describe natural resources and realize the importance of environment protection:
(1)They also help to control the climate.
(2)Rainforests give us wood, rubber, fruit, medicine and so on.
(3)It is important to all living things. We must save every drop of water.
Ⅱ. Teaching aids 教具
录音机/多媒体/小黑板/植树过程的图片
Ⅲ. Five-finger Teaching Plan 五指教学方案
Step 1Review 第一步复习(时间:10分钟)
通过讨论对动植物的看法，复习形容词比较级和最高级形式，导入本课新词。
1. (师生互动示范，然后让学生表演对话，复习描述动物和植物。)
T: Hello, S1, do you like plants or animals?
S1:I like animals better.
T: Why?
S1:Because animals are our friends. They give us joy. They are very friendly to us.
T: Well done! S2, do you like plants or animals?
S2:I like plants better.
T: Why?
S2:Because plants are very important to us. They are useful.
T: Now, class, please practice the dialog like this, OK?
(学生两人一组练习对话。然后找几组学生表演。）
2. (头脑风暴，引出新知识。)
T: Now, please say some animals and plants as many as you can.
Ss: …
T:Where can you see animals and plants?
S3: On the farm.
S4: In the zoo.
S5: In the forest.(教师帮助学生用英语说出forest。)
T: Very good. In a forest, there are many animals and plants. Today we’re going to learn a special forest. It often rains and it is very wet. It is a rainforest.
(板书并要求学生掌握forest；了解rainforest。)
forest, rainforest
(教师通过多媒体展示热带雨林的图片，引出并学习生词及比较级+and+比较级的用法。)
T:It’s a picture of rainforests. They cover 6% of the earth’s surface. Thousands of animals live there. It’s always dark, hot and wet in rainforests. They can help to control the climate. They give us wood, rubber, fruit, medicine and so on. They are very important to us, but they are becoming smaller and smaller, so we must protect them well.
(教师边说边用多媒体呈现短语及生词，并要求学生掌握；理解climate，同时帮助学生理解并掌握smaller and smaller的用法。)
cover, earth, surface, thousands of, dark, control, climate, wood, rubber, smaller and smaller, protect
(学生熟读单词后，再看图片并回答教师提出的问题。)
T:What are they?
Ss: They are rainforests.
T:How large are the rainforests?
Ss: They cover 6% of the earth’s surface.
T:What’s in the rainforests?
Ss: Thousands and thousands of animals live there.
T:What can we get from the rainforests?
Ss: We can get wood, fruit, medicine, rubber and so on.
T:Are they important to us?
Ss: Yes, they are.
T: What should we do then?
Ss: We should protect them well.
T: Good! I hope rainforests will become larger and larger. Do you want to know more about rainforests?
Ss:Yes.
T:Let’s learn Section C together.
Step 2Presentation 第二步呈现(时间:8分钟)
听录音并阅读短文内容，培养学生的听力和阅读能力。
1. (听1a录音，了解课文内容并回答问题。)
T: Most students want to know more about the rainforests. Please listen to the tape and answer the following questions:
(出示小黑板。)
(1)What cover 6% of the earth’s surface?
(2)Are there thousands of different plants and lots of trees in rainforests?
(3)Can rainforests help to control the climate?
(核对答案。)
2. (教师播放1a录音，学生跟读两遍，注意语音语调，并画出关键词。)
T:Read after the tape twice. Pay attention to the pronunciation and intonation, and underline the key words.
(板书)
Paragraph 1: cover 6%—animals—live in—thousands of—dark—wet
Paragraph 2: important—lungs—help to make—control—wood, rubber …—smaller—protect
Step 3Consolidation 第三步巩固(时间:8分钟)
通过对短文的理解，完成1b、1c，并根据关键词对其进行复述。培养学生综合运用语言的能力。
1. (阅读1a，完成1b。)
(教师让学生猜测句子中main的意思，板书并要求学生掌握。)
main
T: Now please read1aand finish 1b.
(核对答案。)
2. (再读1a，完成1c。)
T: Read1aagain and write down the importance of rainforests.
(核对答案。)
T: Class, can you give us your answer?
S1: Make the air fresher.
S2: Control the climate.
S3: Give us wood, rubber, fruit, medicine and so on.
3. (根据黑板上的关键词，用接龙的形式复述短文。)
Example:
T: Now please retell the passage one by one according to the key words.
S4: Rainforests cover 6% of the earth’s surface.
S5: Thousands and thousands of animals live in rainforests.
S6: …
Step 4Practice 第四步练习(时间:14分钟)
通过对四幅图片的描述，让学生认识到水是一种重要的资源，所有生物都离不开水。培养学生节约用水的意识。
1. (师生对话，引出生词导入2a。)
T:Rainforests are very important to us. What do you think of water?
Ss: It’s very important to us, too.
T:What do humans need water to do?
Ss: We need water to drink, to cook and to clean.
T:Yes. In fact, water makes up the largest part of the human body.
(板书并要求学生掌握。)
fact, in fact, make up
T: Water covers most parts of the earth. It’s in rivers, lakes, seas and oceans.
(板书并要求学生掌握。)
lake, sea, ocean
T: All plants and animals need water, that is to say, water is important to all living things, so we must save every drop of water.
(板书并要求学生掌握。)
drop
2. (学生读2a，独立完成2b。教学on earth并要求学生掌握。)
T: There is more information in2a. Read it and finish 2b.
(核对答案。)
3. (学生跟读2a短文，注意语音和语调并画出关键词。)
T: Listen to2aand follow. Pay attention to the pronunciation and intonation. Underline the key words.
(板书)
plants (need, is necessary for)
animals (plenty of, live, without)
humans (drink, cook, clean, makes up)
water (covers, lakes, rivers, seas, oceans, living things, save, drop)
4. (让学生根据关键词复述短文。)
T: Retell thetext using the key words on the blackboard.
(两分钟后选出几名学生到前面复述。)
5. (通过完成3，使学生知道怎样植树，培养学生的`环保意识。)
(1)T: We know water is important to all living things. Trees are important to us, too. So we should plant more trees to improve our environment. Then how to plant trees? Now look at the pictures and match them with the sentences in 3.
(教师用幻灯片出示事先准备好的植树过程的图片和3中的内容，让学生把图片与句子搭配。同时让学生猜测句中hole, fill, fill … with …, dig, deep, everything的意思。)
(板书并要求学生掌握。)
hole, fill, fill … with …, dig, deep, everything
(2)(让学生独立完成3。)
(核对答案。)
Step 5Project 第五步综合探究活动(时间:5分钟)
通过讨论水的重要性，使学生增强保护有限水资源的意识。
1. (讨论有关水的问题。)
T: Just now, we talked about the importance of water. Next, please discuss the following questions about water in groups of four. Then each group gives your opinions in the front.
(出示小黑板。)
(1)Are there rivers and lakes in your hometown?
(2)Is the water there dirty or clean? Why?
(3)What should we do to keep the water clean?
(4)What should we do to save every drop of water?
(把学生分成四人一组，讨论这些问题，然后每组派一人汇报讨论结果。)
2. Homework:
根据讨论结果，以Water is Our Life为题写一篇短文。
板书设计:
Plants and animals are important to us.
Section C
thousands of But, now, rainforests are becoming smaller and smaller …
smaller and smaller Water is necessary for all plants.
in fact They can’t live at all without water.
make up Fill the hole with earth.
be necessary for
be very important to
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