Unit 5 Working the Land Reading for Writing 课件-2026-2027学年高二英语人教版选择性必修第一册

该高中英语课件围绕“化学农业与有机农业”主题，通过视频观看、超市购物情境假设及图片对比（如生姜/洋葱差异、有机与化学 farming 图片）导入，引导学生从生活经验过渡到文本结构和语言分析，再通过匹配段落大意、分析连接词等活动搭建阅读支架，最终落实到议论文写作。 其亮点在于融合语言能力、思维品质和学习能力的培养，如通过“预测-略读-精读”策略提升语言理解与表达，小组讨论分析作者态度、未提及优缺点等问题锻炼批判性思维，议论文写作提供提纲、范文及同伴互评表（含语法、逻辑等检查项）。这既帮助学生掌握对比论证方法，也为教师提供完整的“读-议-写”教学流程，提升教学效率。

Unit 5 Working the Land Reading for writing 人教版2019选择性必修第一册 Learning objectives By the end of this section, you will be able to: predict the main idea of a text based on its title and picture; grasp the features of the text, like its structure and language; write about your opinions on organic farming or chemical farming; cooperate with group mates actively through checking your writings together. Leading in Let’s watch a short video Leading in Suppose that you are going to a supermarket to buy some vegetables for the lunch of family reunion... Which one would you like to choose to buy? Organic food or chemical food 1.What’s the difference between the gingers/onions? 2.Why do they enjoy different prices? Look at the pictures below and guess which one is organic farming? chemical pesticides organic fertilizer artificial fertilisers Chemical Farming Versus Organic Farming Organic Farming Chemical Farming Advantages Disadvantages Improve soil quality protect the environment ... Higher production costs. long conversion period. ... Advantages Disadvantages higher crop yields Lower production costs Short growing cycles ... Threaten people’s health. Cause water and air pollution ... Match the main ideas (A-D) below with the paragraphs. Then complete the sentences in the table. A What organic farming is C Organic methods for producing rich soil D The problems with chemical farming B Why man-made chemicals are still used in farming Reading Predict what the text is about according to the title and pictures Chemical farming and Organic farming. What type of writing is it? Exposition (说明文). Skim the text and explain the meaning of chemical farming and organic farming. It depends heavily on man-made chemical fertilizers and pesticides to increase production. It is a farming method without chemical pesticides or fertilizers. Farmers use natural materials to grow crops and protect the environment. part main idea Detail 1-2 Pesticide can kill helpful . some pesticides have been ,because of the . Crops grown with chemical fertilisers usually to be full of . 3 Many organic farmers use as fertiliser. 4 They often grown in each field . They also plant crops that use of the soil to help keep it rich. 5 Organic farming is nowhere near able to meet the high . D A C B bacteria and insects prohibited damage they cause grow too fast nutrition natural waste from animals change the kind of crop demand for food around the world different depths every year 13 Chemical pesticides and artificial fertilisers have been in widespread use in farming since the middle of the 20th century. When they were first introduced, many farmers welcomed them as a great way to fight crop disease and increase production. Over time, however, what some scientists have found is that their long-term use can sometimes harm both the land and peoples’ health. 自 20 世纪中期起，化学杀虫剂与人造化肥便在农业中得到广泛使用。这类产品刚问世时，许多农户十分青睐，认为它们能有效防治作物病害、提高产量。然而久而久之，部分科学家发现，长期施用这类农资有时会同时破坏土地、损害人体健康。 CHEMICAL VERSUS ORGANIC FARMING 化学农业与有机农业 Read the text, and then answer the questions. Why did many farmers welcome the introduction of chemical farming? Because they regarded chemical farming as a way to fight crop diseases and increase production. What concerns many people about the use of pesticides? what some scientists have found is that their long-term use can sometimes harm both the land and peoples’ health. For example, pesticides can damage the land by killing not only harmful bacteria and insects, but also helpful ones. In addition, these chemicals can stay in the soil and underground water sources for a long time. This affects the crops grown on the land and, in turn, the animals and humans who digest them. Many people worry that these chemicals may make them ill and even cause cancer. In fact, some pesticides like DDT have been prohibited in most countries because of the damage they cause to people and the environment. As for chemical fertilisers, crops grown with them usually grow too fast to be rich in nutrition. They may look beautiful on the outside, but inside there is usually more water than essential minerals, and they often have less flavour as well. 举例来说，杀虫剂不仅会杀死有害细菌和害虫，也会灭杀有益菌群与益虫，从而破坏土地。此外，这类化学物质会长时间残留在土壤与地下水源中。这会影响土地上种植的农作物，进而危害食用这些作物的动物与人类。许多人担心化学农药会致病，甚至诱发癌症。事实上，滴滴涕等部分杀虫剂因对人体和环境危害巨大，已在多数国家遭禁用。至于化肥，施用化肥培育的作物生长过快，营养积累不足。它们外表光鲜饱满，但内部水分远多于关键矿物质，吃起来口感也往往更差。 As an alternative, some farmers have switched to organic farming, and many customers have turned to organic food when they shop at the local grocery. Organic farming is simply farming without using any chemicals. Organic farmers focus on keeping their soil rich and free of disease through natural means. For example, many organic farmers use natural waste from animals as fertiliser. This makes the soil in their fields richer in minerals. It also keeps the air, soil, water, and crops free of chemicals. 作为替代方案，一些农民转而采用有机种植，不少消费者在当地杂货店购物时也会选择有机食品。有机农业，简单来说就是完全不使用任何化学制剂的耕作方式。有机农户依靠自然手段，维持土壤肥沃、杜绝病害。比如，很多有机农户会将动物天然排泄物当作肥料，既能提升土壤矿物质含量，也能让空气、土壤、水源和农作物都远离化学污染。 3. What is one problem with the use of chemical fertilisers? crops grown with them usually grow too fast to be rich in nutrition. They may look beautiful on the outside, but inside there is usually more water than essential minerals, and they often have less flavour as well. 4. How is organic farming different from chemical farming? Organic farming is simply farming without using any chemicals. Soil rich and free of disease through natural means are focused on. Organic farmers also use many other methods to produce rich soil. They often change the kind of crop grown in each field every year. For instance, they may grow corn or wheat in a field one year, and then grow beans there the next. Why different crops are grown is that they put important minerals back into the ground, making it ready for the next batch of crops. Organic farmers also plant diverse crops that use different depths of soil to help keep it rich. For example, peanuts grow on the ground’s surface, but many other vegetables put down deep roots. The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to people’s health. 有机种植者还会采用多种其他方式培育肥沃土壤。他们通常每年更换每块田地的种植作物。例如，一块地今年种玉米或小麦，来年就改种豆类。轮种不同作物，是因为豆类能向土壤补充关键矿物质，为下一季作物做好养分储备。有机农户还会套种深浅根系各异的作物，充分利用不同土层养分，维持土壤肥力。比如花生根系浅，而不少蔬菜扎根很深。各类有机耕作手段的核心目的：产出优质粮食，同时避免破坏环境、损害人体健康。 5. Why do organic farmers change the kind of crop grown in a field every year? Why different crops are grown is that they put important minerals back into the ground, making it ready for the next batch of crops. 6 What is the goal of using organic farming methods? The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to people’s health. Some people would prefer to stop the use of man-made chemicals in agriculture entirely. What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world. Organic farming is nowhere near able to meet that need. Therefore, there is still a long way to find a suitable solution that puts sufficient food on the dinner table while keeping people and the environment as healthy as possible. 有些人希望农业完全停止使用人造化学制剂。然而化学农业能够满足全球巨大的粮食需求，这一点让他们无法彻底摒弃化学品。有机农业目前远远达不到这样的供给能力。因此，我们仍需长期探索合适的解决方案，既要保障充足的粮食供给，又要最大限度守护人类健康与生态环境。 7. Why could some people not choose but use man-made chemicals in agriculture？ Chemical farming serves the high demand for food around the world. Organic farming is nowhere near able to meet that need. Discuss these questions in groups. Discuss these questions in groups. (1)The author uses some connectives when explaining details. Find and underline them. Then think about the what they add to the text. Can you name more connectives according to different classes? connectives in the text: and,but,while,however,for example,for instance,in sddition,in fact,as for.therefore More connectives:递进关系besides, moreover, furthermore, what’s more转折关系however, but, yet, while, on the other hand因果关系so, therefore, as a result, because, since列举 / 顺序关系firstly, secondly, finally; for one thing…for another; such as总结关系in short, in conclusion, all in all Discuss these questions in groups. (2) Find the subject clauses used in the text and underline them. Then make your own sentences on the theme of chemical farming and organic farming. ①Over time, however, what some scientists have found is that their long-term use can sometimes harm both the land and people's health. ②Why different crops are grown is because they put important minerals back into the ground, making it ready for the next batch of crops. ③What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world. • Is the author of the passage for or against organic farming? How do you know? • What other disadvantages of chemical farming did the author not list? • How might the following items be problems and how important are they for organic farming? • What other disadvantages of organic farming can you think of? natural animal waste used as fertiliser higher cost of producing food greater effort required to farm Discuss these questions in groups. Decide whether your group supports chemical arming or organic farming. Come up with three main points to support your opinion, and then add at least one detail to support each main point. Analyze the outline below. Chemical versus organic farming Argumentative writing is to express the author’s opinions through arguing or reasoning. The author who holds a view on a certain issue should put forward several reasons and supporting evidence to persuade others in order to make readers agree with their own views. To write well, we need pay attention to: 1. The topic (论点) 2. Argument (论据) 3. Demonstration (论证) Writing Write an argumentative essay giving your opinion on chemical or organic farming. analyze the outline below. Share your opinion Supporting point 2 Details Supporting point 3 Details Title Supporting point conclusion Supporting point 2 Details opinion In my opinion, farming is preferable to . farming because . Exchange your draft with a partner. (1)Use the checklist to help you review your partner's draft. ✓ Does the writer do a good job of expressing his/her opinion? ✓ Does each paragraph have one main idea? support its main idea? ✓ Does the writer sequence the points in a logical order? Are there any connectives in the essay? ✓ Does the writer use any subject clauses? ✓ Does the writer do a good job persuading you to accept his/her opinion? ✓Does the writer use correct grammar, punctuation, and spelling? (2) Take your draft back and revise it. (3)Share your essay with the rest of the class. 31 Sample writing Organic farming is superior to chemical farming in environment, health and nutrition. Firstly, chemical pesticides and fertilizers pollute soil and water, damaging the natural ecosystem. They also accumulate in our bodies and bring hidden health risks. Secondly, chemically raised crops grow fast but taste plain and lack nutrition. In short, although organic food costs more, it is greener and healthier, which makes it worthwhile organic /ɔːˈɡænɪk/ adj. 有机的；不使用化肥的；有机物的 pesticide /ˈpestɪsaɪd/ n. 杀虫剂；除害药物 拓展 pest n. 害虫 widespread /ˈwaɪdspred/ adj. 分布广的；普遍的；广泛的 bacterium /bækˈtɪəriəm/ n. (pl. bacteria) 细菌 Words and Expressions in turn 相应地；转而；依次；轮流 拓展 in one’s turn 轮到某人时 by turns 轮流地，交替地 take turns doing/to do sth 轮流/轮次做某事 It’s one’s turn to do sth 轮到某人做某事 in return 作为回应；作为回报 in return for ... 作为对……的回报 Words and Expressions digest /daɪˈdʒest/ vt. & vi. 消化 vt. 领会；领悟 /ˈdaɪdʒest/ n. 摘要；文摘 词性转换 digestion n. 消化 mineral /ˈmɪnərəl/ n. 矿物；矿物质 Words and Expressions alternative /ɔːlˈtɜːnətɪv/ n. 可供选择的事物 adj. 可供替代的；非传统的 (1) an alternative to ... ……的替代品 (2) have no alternative but to do sth 除了做某事别无选择 instance /ˈɪnstəns/ n. 例子；实例；事例 for instance 例如；比如 =for example Words and Expressions essential /ɪˈsenʃl/ adj. 完全必要的；极其重要的 (1) (be) essential to/for ... 对……很重要 (2) It is essential (for sb) to do sth （对某人来说）做某事很重要 (3) It is essential that ... (should) do ... 做……很有必要 词性转换 essence n. [U]本质；实质 in essence 从本质上讲 Words and Expressions batch /bætʃ/ n. 一批；一组 vt. 分批处理 depth /depθ/ n. 向下（或向里）的距离；深（度） at/to a depth of ... 在/到……的深度 (2) in depth 全面，深入，详细 词性转换 deep adj. 深的 adv. 在深处；深深地 deeply adv. 很；非常；强烈地；深刻地 deepen vi. & vt. 加深；（使）变深 vt. 增长（知识）；加深（理解） root /ruːt/ n. 根；根茎；根部；根源 Words and Expressions Polish your writings with the advice from your partners and your teacher. Homework Reading for writing 人教版2019选择性必修第一册 Unit 5 Thank You ! $