1、Unit 2 Working the landThe Third Period Extensive ReadingTeaching goals 教学目标1. Target language 目标语言a. 重点词语 chemical, bacteria, pest, lead to, discovery, nutrition, keepfree from, rootb. 重点句型 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 能力目标Enable Ss to master the main idea of the text and know the ways of organizing articles.3. Learning ability goals 学能目标Help Ss learn how to enlarge the words and structures of the same topic.Teaching impor
3、tant and difficult points 教学重难点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 教学方法Show questions, read fast, find the main ideas, and then read carefully and finish all the tasks.Teaching aids 教学准备A recorder and a pr
4、ojector.Teaching procedures 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?
5、)T: Good job! 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
6、yesterday. Ok, 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
7、 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 competition .Two groups, the group which can get the highest marks will be the winner, Are you clear?Ss:
8、 Advantages 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
9、! Well, let 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 g
10、reen 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 the bold word words in the text loudly.Ss: chemical, production St
11、ep Fast ReadingT：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
12、 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 staying in the ground and underground water for a long time. They damage peoples health by build
13、ing 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 food and to avoid damaging the environment or peoples health.T：Wonderful! Boys and girls!Step Intens
14、ive 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 students know how to write a summary.T：Now, this time let us read the passage after the tape sentence by sentence. P
15、lease 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, lets begin.Ss: Main idea of the passageChemical fertilizers can cause many problems, so organic farming is becoming more p
16、opular.Structure 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
17、. Food grown 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.St
18、ep ExplanationShow the following Practice on the screen.1. They focus on keeping their soil rich and free of disease. 考点 动词-ing 短语作介词的宾语。考例 1 Isnt it time you got down to _ the papers? (重庆 2006)A. mark B. be markedC. being marked D. marking 点拨 get down to doing sth. 开始着手干某事，to 在这个短语中是介词, 后可跟动词-ing 形
19、式、名词或代词。又因 mark the papers“判试卷” 与逻辑主语 you 是主动关系，故排除选项 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 watch B. to watchingC. watching D. watch点拨 spend time / money (in) doing sth.花费时间或金钱干某事。doing sth. 作介词 in 的宾语。3. build up 逐渐积聚; 增进，增强Traffic on
20、this road is building up.build up ones strength after an illness. 4. lead to 导致; 通向往His mistakes led to his failure.This road leads to the railway station.5. keep free from“远离”或“避免” keep free from emotional reactions 避免激动的反应 keep free from restrictions 避免受到限制 6. 1. All the rooms are _ with electric
21、lights. (2005 上海）A. supplied B. given C. offered D. burntSupply1) 用作名词时：a) 指 “供给;供应 ”等,其反义词为 demand (需求)。supply and demand 供与求 be in short supply 供应缺乏,供应不足food supply 食物供应 water supply 供水b) 当“供应品;生活用品;补给品 ”等,常用复数 supplies。military supplies 军需品 household supplies 家庭用品medical supplies 医用品2) 用作动词时,指“ 供给,提供 ,备办” 等, supply sb. (with) sth , supply sth. to /for sb.- They supplied food to/for them. 他们供给他食物。- The library is well supplied with books. 图书馆备有充足的书籍。Step Homework1. Finish your writing of summary on P152. Review the reading materials in this Unit .3. Get more about farming.
