高中英语人教大纲第三册：Unit9 Helth cre(第四课时).doc

The Fourth PeriodTeaching Aims:1.Learn and master the following words:incident,significance,bench,sink,jar,lid,devotion2.Train the students integrating skills,especially reading and writing skills.3.Learn about Alexander Fleming and his great contribution to the humans health.Teaching Important Points:1.Understand the passage exactly and learn about Alexander Fleming and his discoverypenicillin.2.Train the students reading and writing ability.Teaching Difficult Point:How to help the students write a good article for a journal.Teaching Methods:1.Free talk to present some information about the passage to the students,so as to make the students interested in it.2.Instructing method to help the students write an article.3.Individul,pair or group work to make every student finish the given tasks better.Teaching Aids:1.the multimedia2.the blackboardTeaching Procedures:Step GreetingsGreet the whole class as usual.Step RevisionT:In the last period,we revised the Subjunctive Mood.Can you use it freely?Ss:Yes.T:Well,lets do an exercise.Look at the screen and finish the exercise in three minutes.Then Ill check your answers.(Teacher shows the screen and the students begin their work quickly.)Correct mistakes if any.1.If you worked harder,you would have succeeded.2.The rice would not have burnt if you had been more careful.3.It was suggested that the medicines were sent here by plane.4.If the sun will not rise tomorrow,what would you do?5.If you hadnt taken such a long time to get dressed,wed have got there by now.6.How I wish I had been able to say the rules without a mistake!Suggested answers:1.workedhad worked2.have burnthave been burnt3.werebe4.willdid5.have gotget6.Step PresentationT:In this unit,weve talked a lot about health care and society.It is known to us that the government has made great efforts to improve health care.However,there are some persons who have also made great contributions to health care.Do you know what kinds of person they are?Ss:It must be doctors,nurses,chemists and medicine scientists.T:You are right.For example,in 1928,a young Scottish scientist discovered a chemical that was very effective in curing infections.Do you know who he was?Ss:Alexander Fleming.T:What did he call the chemical?Ss:Penicillin.T:Yes.It was Flemings great discovery that changed hospitals and health care for ever.Thanks to his discovery,many lives have been saved.Today,we are going to read a passage about Alexander Fleming and his discovery penicillin.First,lets learn the new words in it.(Teacher shows the following on the screen and deals with the new words as usual.)Step ReadingT:OK.Now,please open your books at Page 79.Read the passage The Little Mould That Could silently and quickly.Then finish the first exercise after it.Five minutes later,Ill check your answers.Suggested answers:Ex.11.C2.B3.D4.B5.B6.CT:Well,youve understood it very well.In order to get a more exact meaning of the text,lets learn some sentences in it.OK?Ss:OK.(Teacher shows the sentences on the screen.)1.Treatment were neither scientific nor effective,and many patients suffered deadly infection as a result of operation.2.This medical was able to fight mild infections,but it was not strong enough to cure serious infections.3.Despite their lack of interest,Fleming kept trying to develop the chemical sp that it would be safe and effective.4.It was not until World War that the importance of Flemings discovery was fully recognized.5.When asked about his discovery,Sir Alexander Fleming said,“One sometimes finds what one is not looking for.”T:Now look at the sentences on the screen.Ill ask some students to translate them into Chinese.One student,one sentence.The others listen carefully and tell if their translations are right.Li Ming,the first sentence.S1:治疗既不科学，也没什么效果，许多病人手术后严重感染。T：S2:这种药物能治疗轻微的感染，但对于严重感染，其药效还不够强而不能治愈。S3:尽管其他科学家对弗莱明的发现不感兴趣，但他还是继续努力研制这种药物以使其安全而有效。S4:直到二战，弗莱明发现的药物的重要性才被完全接受。S5:当有人问及亚历山大弗莱明自己的发明时，他说：“一个人有时会发现他自己并未寻找的东西。”(Bb:neither.nor,as a result of,enough to.,lack of,keep doing,so that,It was not until.that.,when done.)T:You all did good jobs.Now lets go on to do Ex.2.Work in pairs and choose which of the characteristics below do you think helped Alexander Fleming discover penicillin.At the same time,explain your choices.If necessary,read the text carefully again.You can begin now.(Several minutes later,teacher checks their work.)T:Are you ready now?Ss:Yes.T:Well,whod like to be the first to talk about your choice?S6:I will.In my opinion,it was a doctors sense of responsibility that helped Alexander Fleming discover penicillin.With this characteristic,he devoted himself to his duty and observed carefully.S7:I think it was the characteristics of sympathy that helped Alexander Fleming discover penicillin.Without sympathy,he would not make efforts to search for the chemical which he believed could treat infections.S8:.T:Well,all your choices sound reasonable.After class,go on to ask about others choices.Now,lets listen to the tape of the passage and further understand it.Ready?Ss:Ready.(Teacher plays the tape.After listening,teacher begins to deal with the next part.)Step WritingT:Now imagine that you are Alexander Fleming.You have just discovered penicillin and you are very excited about the new chemical.Do you want to tell other doctors about your discovery?Ss:Of course I do.T:What do you want to tell them?Wang Hong.S9:First tell them what I have discovered and then what it can be used to do.T:By what means can you tell them?Li Xia.S10:By writing an article in a famous medical journal.T:What do you think of her idea?Ss:Very good.T:OK.Now,please write your article in the form of a letter.You may use the information given on the screen.(Teacher shows the following on the screen.The students begin to write their articles.If time permits,teacher may ask some students to read their articles to the class.)Penicillinis a natural mould that is easy to grow and usewill make hospital safercan cure infectionskill bacteriacan be used to treat diseasesA sample article:Every doctor,Im very glad to tell you that I have discovered a new chemical,a mould growing on the culture of some harmful kind of bacteria.It is a natural mould that is easy to grow and use.More importantly,the mould seems to be able to kill the bacteria.I examined it carefully and found out it belonged to a strain of penicillin which could kill off bacteria while not causing any damage to wounds.It worked against many kinds of bacteria.Later,a series of experiments proved my finds,and therefore,I called it penicillin,which could cure infections by killing bacteria and was mostly safe for the human body.As a result,the existence of penicillin would make hospitals much more safer.I wish the discovery of the mould could be useful to treat diseases that had been considered incurable.If really so,I would feel very delighted.Alexander FlemingStep Summary and HomeworkT:Now,lets see what weve learnt in this period.First,weve read the passage about Alexander Fleming and his discovery penicillin.Its his discovery that changed hospitals and health care for ever.His discovery is a story of hard work and a happy accident.We can learn much f