Unit 19Modern agriculture.Teaching Goals:1.Talk about modern agriculture and the effects it has on peoples life.2.Practise giving advice and making decisions.3.Use “It” for emphasis.4.Read statistical graphs.5.Write a plan for a vegetable garden.Teaching Time:Five periods.Background Information:The First PeriodTeaching Aims:1.Improve the students speaking ability by practising giving advice and making decisions.2.Enable the students to master the expressions of giving advice and making decisions.3.Get the students to learn more about agriculture.Teaching Important Points:1.How to express oneself,using what is learned or given.2.How to advise sb.to do something and how to make decisions.Teaching Difficult Points:1.The usage of some expressions.2.How to improve the students listening ability.Teaching Methods:1.Listening some materials to improve the students listening ability.2.Discussion to let the students express themselves freely.3.Group work or pair work to give every student a chance to express themselves.Teaching Aids:1.a tape recorder2.a projector and some slides3.a computerTeaching Procedures:step .Greetings and RevisionT:Good morning,everyone.Ss:Good morning,teacher.T:Sit down,please.In this class,Ill check your homework first,Wang Ping,read your homework to us,(The teacher checks the students homework and have a discussion with the students about the mistake Wang Ping made.Let the students have a clear understanding and correct it.)step .Preparation for listening and speakingT:Today,were going to learn a new unit,Unit 19,Modern Agriculture(Teacher writes the following on the blackboard:Unit 19 Modern agriculture,the First Period).First,lets learn the new words of this period.Look at the screen:New words:produce n.产量、产物、农产品effect n.结果、影响、作用dike n.堤坝；排水沟drought n.干旱leader n.领导者lead v.领导、带领cane n.细长的茎、藤条sugar-cane n.甘蔗tobacco n.(烟草)制品；抽烟local adj.地方的、当地的(Teacher asks one student to read the new words,then corrects the mistakes the student made.)Step .Warming upT:Please turn to Page 32.Lets do Warming up.(Teacher shows the graphs on Page 32 on the screen.)Look at the two graphs and discuss the questions on Page 32.You can do it in pairs or groups.In a few minutes,Ill ask some students to talk about them.(Students begin to discuss the questions.And teacher goes and joins them.A few minutes later,teacher says the following.)T:Are you ready?Who can give us a talk about the first topic?SA,how are peoples eating habbits changing over the years?SA:From the first graph,we can see that the eating habits of the people in our country have changed greatly.Before 1949,they had not enough to eat and often went hungry.Once natural disasters happened,a great number of people would die of hunger.Before the reforming and opening to the world,grain was still a big problem.People mainly lived on corn and few kinds of vegetables.Since the 1980s,especially the 1990s,peoples eating habits have greatly improved.People can eat whatever they want.More and more people eat less grain,more meat and eggs and so on.More and more people turn their eyes to meat,eggs,milk and all kinds of green vegetables.T:Why do you think this happens,SB?SB:It is all because of the Partys good policies.T:Very good.It is true and everyone can see that.How has agricultural produce changed during the first half of the 1990s?And what do you think caused these changes?SC:From the first half of the 1990s,scientists started to develop new techniques to increase agricultural production without causing damage to the environment.Especially the new technique, “GM”,has made agricultural production increase continuously.Scientists develop new kinds of seeds,better cows,pigs,sheep as well as fish.It is the new techniques that make all this possible.T:Do you agree with him,SD?SD:Yes,I do.And I want to give an answer to the three question.T:Good,please say that.SD:With the changes in peoples eating habits,agriculture as well as nature will have to change,too.People are eating more meat and milk.That is to say,they need more fish,pigs,sheep and cattle as well as poultry.To feed these animals,we need more grain,especially more grass.To protect our environment,the ways to raise animals have changed.With the development of modern science and techniques,some of the fields are not needed to produce more food.We can grow grass,flowers etc.on them.Less farmers are needed and they can do other kinds of work.Step .ListeningT:So much for the discussion.Next well do listening.The passage youll listen to is about farming.It tells us about farming of all countries in early times and protection of nature and environment.Listen to the tape carefully and do the exercises concerned.Now,read the requirements,please.(Students read the requirements.)Now do you know what youll have to do after listening to the passage?(Ss:Yes.)During lis