高中英语人教版 (2019)选择性必修 第一册Unit 5 Working the Land教学设计

这是一份高中英语人教版 (2019)选择性必修 第一册Unit 5 Working the Land教学设计，共6页。
2019新人教高中英语选择性必修一Unit5 Using LanguageEvaluate chemical farming and organic farming公开课教案Teaching aims:   Enable students to know the difference between chemical farming and organic farming.   Know the structure of an argumentative essay and the writing skills of an argumentative essay, such as illustrating, giving examples or making contrasts.   Write an argumentative essay using what they will learn in this period.Teaching key points:   Analyse the difference between chemical farming and organic farming.   Analyse the structure and the writing skills of the argumentative essay.Teaching difficult points:   Analyse the structure and the writing skills of the argumentative essay.   Write an argumentative essay using what they will learn in this period.Teaching procedures:Step Lead-inActivity 1　Making predictions(1)Look at the title of the passage and try to guess what will be talked about in the passage.(2)If you were asked to write the passage under this title,what is your structure?Suggested answers:(1)What the text will talk about will include:the definitions of both kinds of farming and the advantages and disadvantages of each.(2)My structure may be like this:Activity2 Picture guessingHere are 6 pictures.Try to find out which ones are about chemical farming and which are organic according to your background knowledge.Suggested answers:Picture 1 organic farming;Picture 2 chemical farming;Picture 3 organic farming;Picture 4 organic farming;Picture 5 organic farming;Picture 6 chemical farming.StepⅡTest our predictionsRead the text quickly and silently and try to find what is the main idea of each paragraph.And then draw the map of the structure.Para.1_____________________________________________Para.2_____________________________________________Para.3_____________________________________________Para.4_____________________________________________Para.5_____________________________________________Suggested answers:Para.1 Chemical farming helps fight crop disease and increase production.(advantage)Para.2 Three disadvantages of chemical farming.(disadvantages)Para.3 The definition of organic farming and one of its advantages.(advantage)Para.4 Other different methods of organic farming and their advantages.(advantages)Para.5 The disadvantage of organic farming and show the attitude of the writer to the readers.(disadvantage & attitude)Therefore the structure of the passage is:(so our guess is quite right.)StepⅢ Read for details：Read the text carefully and complete the table.（红色为学生填写部分）ChemicalfarmingadvantageA great way to fight crop disease and increase production.disadvantages1.Kill not only harmful bacteria and insects but also helpful ones.2.Affect not only the crops but also the animals and humans who digest them.3.Crops are lacking in nutrition.Organicfarmingadvantages1.The soil is rich in minerals.2.Keep the air,soil,water and crops free of chemicals.3.Avoid damage to the environment or to people’s health.disadvantageNowhere near able to meet the need.The writer’s attitudeHe/She is for organic farming.But there is still a long way to find a suitable solution.StepⅣ Read for the organization and languageActivity 1　Read the text carefully again and find out the transitional words and think about their functions.Suggested answers:The transitional words:for example,not only...but also,in addition,in turn,in fact,as for,but,and,as well.Activity 2　Discuss the following questions.(1)What other advantages and disadvantages of organic farming did the author not list? (2)Which kind of farming do you like?And why?Suggested answers:(1)Advantages:Organic food is more nutritious and has much flavour.Farmers can get more money out of organic farming.Disadvantages:higher cost of producing food;greater effort required to farm.(2)I like organic farming.Because organic food is more delicious and more healthy.StepⅤWritingWrite an argumentative essay giving your opinion on chemical or organic farming.Activity 1　Complete the outline below.（红色部分为学生填写部分）Topic sentence:In my opinion,__________farming is preferable to__________ 　　　farming because ___________Point 1:Chemical farming harms the environment.(Detail): Chemical pesticides are not found in nature, and normal natural processes cannot get rid of them.Point 2：Chemical farming harms us people.(Detail):We end up eating plants,diary products, eggs, and meat that have high levels of pesticides.Point 3 :Organic food is generally more nutritious than food grown with man-made chemicals.(Detail):Chemicals are commonly used in farming to grow larger crops more quickly.Conclusion: I would like to suggest buying organic food.Suggested answers:Topic sentence:In my opinion,organic farming is preferable to chemical farming because chemical farming does harm to not only the environment but also people and because chemical food has less nutrition while organic food is more nutritious.Activity 2　Use your outline to write a short essay giving your opinion on the topic,paying attention to using right transitional words.Activity 3　Exchange your drafts with another pair.Use this checklist to give them helpful feedback.√ Does the writer do a good job of expressing his/her opinion?√ Does each paragraph have one main idea?√ Does each paragraph have at least one detail to support its main idea?√ Does the writer sequence the points in logical order?√ Does the writer do a good job persuading you to accept his/her opinion?Activity 4　Polish your draft and share it with your partner.Suggested answer:In my opinion,organic farming is preferable to chemical farming because of the benefits to the environment and people,and because organic food is more nutritious.To begin with,chemical farming harms the environment.Since chemical pesticides are not found in nature,and normal natural processes cannot get rid of them.Instead,the chemicals tend to accumulate in the soil and water,and are absorbed in the food chain,where they poison wildlife and domestic animals.This affects us directly,because we end up eating plants,dairy products,eggs,and meat that have high levels of pesticides.Think about it:The purpose of the pesticides is to kill “pests”.Something that can kill an insect probably is not healthy for a person to eat.While it may be true that the food we eat does not have enough pesticide in it to kill us immediately,over the years this pesticide may cause us health problems or give us diseases such as cancer.Finally,organic food is generally more nutritious than food grown with man-made chemicals.There was the case of watermelons literally exploding in the fields because they had been given chemicals to make them grow faster.The reason why they exploded was that they contained too much water,because the farmers had used too many chemicals and the weather was unusually wet.As it turns out,such chemicals are commonly used in farming to grow larger crops more quickly.Do you really want to eat watered-down fruit or vegetables which have been rushed to market?They cannot possibly taste as good as organic vegetables,nor can they be as nutritious.In closing,I would like to suggest buying organic food.Yes,the price is a little higher,but the small price we pay extra will bring us huge rewards in the end.StepⅥ　Homework1.Put up the poster in your classroom or in a public place.2.Appreciate your classmates’ good works and try to learn from them.