高中英語 Unit 2《Working the land》教案（4） 新人教版必修4

1、Unit 2 Working the landThe Third Period Extensive ReadingTeaching goals 教學(xué)目標(biāo)1. Target language 目標(biāo)語言a. 重點(diǎn)詞語 chemical, bacteria, pest, lead to, discovery, nutrition, keepfree from, rootb. 重點(diǎn)句型 With these discoveries, some farmer and many customers are beginning to turn to organic farming.Over the past

2、 half century, using chemical fertilizers has become very common in farming.2. Ability goals 能力目標(biāo)Enable Ss to master the main idea of the text and know the ways of organizing articles.3. Learning ability goals 學(xué)能目標(biāo)Help Ss learn how to enlarge the words and structures of the same topic.Teaching impor

3、tant and difficult points 教學(xué)重難點(diǎn)1. How to grasp the main idea of the passage.2. How to grasp the words and phrases and be able to use them freely.Teaching methods 教學(xué)方法Show questions, read fast, find the main ideas, and then read carefully and finish all the tasks.Teaching aids 教學(xué)準(zhǔn)備A recorder and a pr

4、ojector.Teaching procedures & ways 教學(xué)過程與方法Step Leading in Enjoy a beautiful song A quiz & Fill blanksT: Morning, boys and girls! Glad to see you! Before learning, Let us enjoy a beautiful song. What is this song about? Yes, it is about the agriculture .Agriculture can provide us with food .C

5、an you tell me; do you have healthy food everyday? Is healthy food important to us?Ss: Yeah! Glad to see you! Yes, I think that the food we eat everyday is healthy food! I think healthy food is important to us all!(First,Let students taste some delicious food and guess what the food are?)T: Good job

6、! Really? First, let us have a quiz. I would like some students come here to taste the food in this plate and tell us the name of the food. Remember, you need close your eyes before you taste the food.Ss: OK.T: Are they delicious? This food is green food that I brought from Super Market yesterday. O

7、k, boys and girls! Listen to me carefully! Everybody knows that as peoples living condition improves, more and more people are concerned about what they eat. Because more and more farmers use chemical fertilizer instead of natural waste from animals and they use poison to kill insects to protect the

8、ir plants. So people now all want to eat green food which does no harm to their health. Well, How do you understand green food? Do you know the advantages of green food? Let us have a competition .Two groups, the group which can get the highest marks will be the winner, Are you clear?Ss: Advantages

9、of green food* taste delicious*grown in clean air*free of p pollution*rich in nutrition*do good to peoples health and the environmentT：Well done! Everyone. Can you tell me which kind of farming makes green food? Chemical or Organic Farming?Ss: Organic Farming!T: Great! You did a good job! Well, let

10、us read the text on P14 and know something about organic farming.Step Pre readingT: Before reading the text, please look at the picture first and predict what the passage about. Then have free talks on what can you see in the picture?Ss: The picture may be about agriculture. We can see green field,

11、mountains and tall trees .we also can see some animals, such as chickens, pigs, geese, and ducks and so on. Not far away, a man is driving a tractor to plowing fields. T：Excellent! Now, before reading the passage, Let read the bold word words in the text loudly.Ss: chemical, production Step Fast Rea

12、dingT：Let us read the text first and then finish the following questions after reading the passage. You only have 3 minutes.Questions:1. Why are chemical fertilizers so popular in farming today?2. What problems can be caused by using chemical fertilizers?3. What is organic farming?4. What is the mai

13、n reason for using organic farming methods?Answers:1. They are a great way to stop crop disease and increase production.2. They can damage the land by killing helpful bacteria and pests and by staying in the ground and underground water for a long time. They damage peoples health by building up in t

14、heir bodies and leading to cancer or other illnesses.3. Organic farming means growing crops without using any chemicals.4. The main reason for using organic farming methods is to grow good food and to avoid damaging the environment or peoples health.T：Wonderful! Boys and girls!Step Intensive reading

15、 Find the main idea and the topic sentence of each paragraph to know the structure of this passage. According to the main idea and the topic sentence of each paragraph, let students know how to write a summary.T：Now, this time let us read the passage after the tape sentence by sentence. Please pay a

16、ttention to the pronunciation and pauses of each sentence. Then find out the main idea and topic sentence of each paragraph to know the structure of this passage. Ok, lets begin.Ss: Main idea of the passageChemical fertilizers can cause many problems, so organic farming is becoming more popular.Stru

17、cture of the textParagraph 1: using chemical fertilizers for a long time can hurt the land and also peoples healthParagraph 2: Problem caused by chemical fertilizers1. Damage the land by killing the helpful bacteria and pests as well as the harmful ones2. Lead to cancer or other illness.3. Food grow

18、n with chemical fertilizers look beautiful, but inside there is usually more water than vitamins and minerals.Paragraph 3: Organic farming is becoming more popular with some farmers and many customers after these discoveries came out. Paragraph 4: Other methods to keep the soil fertile.Step Explanat

19、ionShow the following Practice on the screen.1. They focus on keeping their soil rich and free of disease. 考點(diǎn) 動(dòng)詞-ing短語作介詞的賓語?？祭? Isnt it time you got down to _ the papers? (重慶2006)A. mark B. be markedC. being marked D. marking 點(diǎn)撥 get down to doing sth. 開始著手干某事，to在這個(gè)短語中是介詞, 后可跟動(dòng)詞-ing形式、名詞或代詞。又因mark t

20、he papers“判試卷”與邏輯主語you是主動(dòng)關(guān)系，故排除選項(xiàng)C。2.考例2 According to a recent U.S. survey, children spent up to 25 hours a week _ TV. (上海2004)A. to watchB. to watchingC. watching D. watch點(diǎn)撥 spend time / money (in) doing sth.花費(fèi)時(shí)間或金錢干某事。doing sth. 作介詞in的賓語。3. build up 逐漸積聚; 增進(jìn)，增強(qiáng) Traffic on this road is building up. build up ones strength after an illness. 4. lead to 導(dǎo)致; 通向往 His mistakes led to his failure. This road leads to the railway station.5. keep free from “遠(yuǎn)離”或“避免” keep free from emotio