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1、2022年高中英語(yǔ) Unit 2《Working the land》教案（4） 新人教版必修4 Teaching goals 教學(xué)目標(biāo) 1. Target language 目標(biāo)語(yǔ)言 a. 重點(diǎn)詞語(yǔ) chemical, bacteria, pest, lead to, discovery, nutrition, keep…free from, root b. 重點(diǎn)句型 With these discoveries, some farmer and many customers are beginning to turn to organic farming. Over the

2、 past half century, using chemical fertilizers has bee very mon 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. Teach

3、ing important 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

4、 A recorder and a projector. Teaching procedures & ways 教學(xué)過(guò)程與方法 Step Ⅰ Leading – in ★ Enjoy a beautiful song ★ A quiz & Fill blanks T: 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 .Agricu

5、lture can provide us with food .Can 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 a

6、nd guess what the food are?) T: Good job! Really? First, let us have a quiz. I would like some students e 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

7、 that I brought from Super Market yesterday. Ok, boys and girls! Listen to me carefully! Everybody knows that as people’s 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

8、 they use poison to kill insects to protect their 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 petition .Two groups, the group which can get the highest marks will

9、be the winner, Are you clear? Ss: Advantages of green food * taste delicious *grown in clean air *free of p pollution *rich in nutrition *do good to people’s health and the environment T：Well done! Everyone. Can you tell me which kind of farming makes green food? Chemical or Organic Farming?

10、 Ss: Organic Farming! T: Great! You did a good job! Well, let us read the text on P14 and know something about organic farming. Step Ⅱ Pre – reading T: 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 p

11、icture? Ss: The picture may be about agriculture. We can see green field, 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

12、the bold word words in the text loudly. Ss: chemical, production … Step Ⅲ Fast Reading T：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 pro

13、blems can be caused by using chemical fertilizers? 3. What is organic farming? 4. What is the main 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 st

14、aying in the ground and underground water for a long time. They damage people’s health by building up in their 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 f

15、ood and to avoid damaging the environment or people’s health. T：Wonderful! Boys and girls! Step Ⅳ Intensive reading ★ 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 st

16、udents know how to write a summary. T：Now, this time let us read the passage after the tape sentence by sentence. Please pay attention 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, let’

17、s begin. Ss: Main idea of the passage Chemical fertilizers can cause many problems, so organic farming is being more popular. Structure of the text Paragraph 1: using chemical fertilizers for a long time can hurt the land and also people’s health Paragraph 2: Problem caused by chemical fertili

18、zers 1. Damage the land by killing the helpful bacteria and pests as well as the harmful ones 2. Lead to cancer or other illness. 3. Food grown with chemical fertilizers look beautiful, but inside there is usually more water than vitamins and minerals. Paragraph 3: Organic farming is being more

19、 popular with some farmers and many customers after these discoveries came out. Paragraph 4: Other methods to keep the soil fertile. Step Ⅴ Explanation Show 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(yǔ)作介詞的

20、賓語(yǔ)。 [考例1] Isn’t it time you got down to ____ the papers? (重慶xx) A. mark B. be marked C. being marked D. marking ★[點(diǎn)撥] get down to doing sth. 開(kāi)始著手干某事，to在這個(gè)短語(yǔ)中是介詞, 后可跟動(dòng)詞-ing形式、名詞或代詞。又因mark the papers“判試卷”與邏輯主語(yǔ)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. surv

21、ey, children spent up to 25 hours a week ______ TV. (上海xx) A. to watch B. to watching C. watching D. watch [點(diǎn)撥] spend time / money (in) doing sth.花費(fèi)時(shí)間或金錢(qián)干某事。doing sth. 作介詞in的賓語(yǔ)。 3. build up 逐漸積聚; 增進(jìn)，增強(qiáng) Traffic on this road is building up. build up one’s strength after an illness.

22、 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 emotional reactions 避免激動(dòng)的反應(yīng) keep free from restrictions 避免受到限制 6. 1. All the rooms are ___ with electric lights. (xx 上海） A.

23、 supplied B. given C. offered D. burnt ★Supply 1) 用作名詞時(shí)： a) 指“供給;供應(yīng)”等,其反義詞為demand (需求)。 supply and demand 供與求 be in short supply 供應(yīng)缺乏,供應(yīng)不足 food supply 食物供應(yīng) water supply 供水 b) 當(dāng)“供應(yīng)品;生活用品;補(bǔ)給品”等,常用

24、復(fù)數(shù)supplies。 military supplies 軍需品 household supplies 家庭用品 medical supplies 醫(yī)用品 2) 用作動(dòng)詞時(shí),指“供給,提供,備辦”等, supply sb. (with) sth , supply sth. to /for sb. -- They supplied food to/for them. 他們供給他食物。 -- The library is well supplied with books. 圖書(shū)館備有充足的書(shū)籍。 Step Ⅵ Homework 1. Finish your writing of summary on P15 2. Review the reading materials in this Unit . 3. Get more about farming.