高中英语Working the land学案 5页

Unit 2 Working the land Period 4 Using language: Extensive reading Teaching aims:‎ I. Topics: Chemical or organic farming II. Useful words and expressions: Chemical, production, bacteria, pest, nutrition, mineral, discovery, focus, soil, reduce, root, skim, underline, summary, comment, build up, lead to, focus on, keep...free from/ of III. Ability and emotion 1. Develop Ss’ reading skills by extensive reading and enable them to learn how to use different reading skills to read different reading materials.‎ 2. Have Ss tell about modern agriculture and organic farming.‎ 3. Let Ss have a better understanding of organic farming and pay attention to the quality of food we eat.‎ Step1 Leading in Ask Ss what they know about organic farming. Collect their ideas on the blackboard. ‎ Step 2 Skimming ‎ Ask Ss to skim the passage and find the main idea of this passage and each paragraph.‎ Paragraph&passage Main idea Paragraph 1‎ Paragraph 2‎ Paragraph 3‎ Paragraph 4‎ Passage Step 3 Scanning ‎1 Ask Ss to scan the passage to locate particular information and answer the following questions in Exercise 1 an then fill in the form about the methods and advantages in Exercise 2. ‎ Methods of organic farming ‎ Advantages of methods ‎1.Farmers use natural waste from animal.‎ This makes the soil richer in minerals and so more fertile.‎ Step 4 Careful reading Ask Ss to read the passage carefully and then write a summary of the passage following the procedure in Exercise 3.‎ ‎1).What is organic farming?‎ ‎2).What problems are caused by using chemical fertilizers?‎ ‎3).Why do organic farmers grow peas or soybeans after corn or wheat?‎ Step 5 Retelling Now please retell the text according to the following chart, you can discuss in groups. Organic farming ‎1.Crops growing with natural fertilizers. ‎2.Farmers prefer natural waste from animals. ‎①make...richer and more fertile　　①leaving...is not good ‎②reduce...and help...strong　　　 ②grow...year after year ‎③the fertilizers kill...and healthy ‎④keep free...from chemicals Step 6 Language points Teacher explains the important words and expressions from the reading. Try to use as many examples as possible to illustrate the point. After illustration, teacher can give students some exercise to consolidate their understanding. Language Points ‎1. Many farmers welcomed them as a great way to stop crop disease and increase production.‎ 很多农民喜欢使用化肥，把化肥作为防止农作物病虫害和提高产量的重要手段。‎ production：n. 生产，制造 e.g. ________ of computers has increased double in the last few weeks.‎ ‎ 近几周以来电脑的产量增加了一倍。‎ ‎ This new theatre is becoming known for its good ________.‎ ‎ 这家新剧院因上演的节目好而渐渐出名。‎ ‎2. These chemicals in the food supply build up in people’s bodies over time. ‎ 随着时间的推移，食物中的这些化学成分会在人体中堆积。‎ Build up: 变得更大、更多或更强 e.g. Traffic is ________ ________ on roads into the city.‎ ‎ 来往的车辆在通往市区的路上越聚越多。‎ ‎ The disease can also ________ ________ pressure in the inner ear leading to severe earaches. 这种疾病还会使内耳的压力更强，从而导致严重的耳聋。‎ ‎3. Many of these chemicals can lead to canner or other illnesses.‎ 很多化学成分能导致癌症或其他疾病。‎ lead to: 导致（某种）结果；造成 e.g. This misprint ________ ________ great confusion.‎ 这个印刷错误造成很大的混淆。‎ Closing the factory will ________ ________ 300 job losses.‎ ‎4.They focus on keeping their soil rich and free of disease.‎ 他们（农民）关心的是保持土壤肥沃并且免受病害。‎ focus on: 集中（注意力、精力）于 e.g. Please ________ ________ ________ ________ the following problem.‎ 请集中精力思考下列问题。‎ Many papers ________ ________ ________ ________ the controversy surrounding foreign affairs. ‎ 这些论文使他们的注意力集中在外交事务的争议上。‎ ‎5. A healthy soil reduces disease and helps crops grow strong and healthy.‎ 肥沃的土地能减少病虫并促进植物生长得更茁壮。‎ reduce：v.减少；减缩 e.g. The company tries to increase profits by ________ ________.‎ 公司尽力通过减少花销来提高利润。 We ________ ________expenses this year. 今年我们已经减少了业务开支。　　‎ ‎6. They feel that this makes the soil in their fields richer in minerals and so more fertile. This also keeps the air, soil, water and crops free from chemicals.‎ 他们认为这样会使地里的土壤更富含矿物质，因而也会更加肥沃，同时还可以让空气、土壤、水以及农作物不受化学物质的污染。‎ keep…free of/from: 使……免受（影响；伤害）‎ e.g. Eating well and good exercise ________ ________ ________ ________ cold.‎ ‎ 健康饮食和锻炼使你远离感冒。‎ keep (oneself) from doing sth: 克制自己不做某事 e.g. I just managed to ________ ________ ________ falling.‎ ‎ 我努力不让自己摔倒。‎ keep sth from sb: 不想将某事告诉某人 e.g. She knew that Paul was ________ _______ _______ ________.‎ ‎ 她知道保罗有事瞒着她。‎ Step7 Homework Finish off the Workbook exercises P49. ‎ 自测自评： Ⅰ.单词拼写 ‎1.H　　　 is one of the biggest problems in developing countries. ‎2.The o　　　 of grain has doubled in China in the last ten years. ‎3.He enjoys playing the v　　　 while his brother likes singing. ‎4.Are you s　　　 with your exam result? ‎5.N　　　 fertilizers are better than chemical ones. ‎6.The American people 　　　 (斗争)to get independence from Britain. ‎7.His skin is black because he got 　　　(日晒) in his holiday. ‎8.Middle school students are not allowed to drive 　　　(摩托). ‎9.China is rich in 　　　 （矿产） resources. ‎10.It is 　　　 （肯定）that the weather is turning warm. Ⅱ.句型转换 ‎1. I don’t like playing football. But I like playing basketball. I _________ playing basketball _________ playing football. ‎2. It is necessary for me to buy a new bike. ‎__________________ is necessary. ‎3. The new building is 200 metres high. The old building was only 50 metres high. The new building is __________________ as the old building. ‎4. Bob awoke from his dream with the hope that he can could buy a new car. Bob awoke from his dream with the hope of __________________. ‎5. Ben went closer to the painting in order to see it clearly. Ben went closer to the painting __________________ he could see it clearly. III. 阅读下面一段短文, 用所给动词的正确形式填空。 born regard search for devote expand thanks to rid satisfied with would rather lead He wants everyone to call him a farmer. For that’s how he ___1___ himself. ___2___ into a poor farmer’s family in 1931, Dr Yuan graduated from SouthWest Agriculture college in 1953.Since then, he has ___3___ his life to finding ways to grow more and more rice. Dr Yuan ___4___ a way to increase rice harvests without ___5___ the area of fields. ___6___ his research, the UN is trying to ___7___ the world of hunger. You might guess that Dr Yuan, who is now rich and famous, is ___8___ his life. However, he cares about little spending the money on himself or ___9___ a comfortable life. Indeed, he believes that a person with too much money has more, ___10___ few troubles. 答案 Step 2 Skimming ‎ Para‎.1 In recent days, scientists have discovered that using chemical fertilizers for a long time can hurt the land and also people’s health.‎ Para.2 There are several problems by chemical fertilizers.‎ Para.3 Organic farming is becoming more popular with some farmers and many customers after there discoveries came out.‎ Para.4 There are many organic farming methods for making the land healthy and ‎ productive.‎ Passage Chemical fertilizers can cause many problems, so organic farming is becoming more popular.‎ Step3 Scanning Methods of organic farming ‎ Advantages of methods ‎1.Farmers use natural waste from animal.‎ This makes the soil richer in minerals and so more fertile.‎ ‎2. Farmers often change the kind of crop in each field every few years ‎ ‎2. Changing the crops the minerals in the soil and help it become rich and healthy ‎3. Farmers plant crops with different lengths of roots ‎3. This use different levels of soil Step4 Careful reading (1) Organic farming means growing crops without using any chemicals.‎ (2) There are three problems. First, chemical fertilizers affect the soil and the water supply badly. Second, they allow farmers to grow the same crop year after year and exhaust the soil. Third, they kill both helpful and harmful pests. ‎ (3) Farmers grow peas or soybeans after corn or wheat so that peas and beans can put minerals back into the soil, making it rich and healthy and ready to grow more wheat or corn.‎ Language Points 1. Production; production 2. building up; build up 3. led to; lead to 4. focus your minds on; focus their attention on 5. reducing costs; have reduced 6. keep you free from/of; keep myself from; keeping something from her 自测自评:‎ I．单词拼写 ‎1. Hunger 2. output 3. violin 4. satisfied 5. Natural ‎6. struggled 7. sunburnt 8. motorcycles 9. mineral 10. certain II. 句型转换 ‎1. prefer to ; 2. Buying a new bike for me ‎ ‎3. four times as high 4. buying a new car ‎5. so that/in order to ‎ III. 正确的形式填空 ‎1. regards 2. Born 3. devoted 4. searched for 5. expanding ‎ ‎6. Thanks to 7. rid 8. satisfied 9. leading 10. rather than