1、普通高中课程标准实验教科书英语必修 2UNIT3 COMPUTERS 设计说明：本单元是新课标高中英语必修 2 unit3，中心话题是“计算机” ，本稿设计的内容是热身和阅读两部分，分两课时完成。为了让学生在学习课文之前能够充分热身，对探究计算机的发展演变过程产生浓厚兴趣，热身部分不仅有丰富的图片及易懂的文字介绍，而且有可行的词汇学习和话题让学生进行讨论，这样能让学生充分热身顺利进入下一环节阅读。由于有了热身部分的充分准备，学生对计算机的了解增加了不少，而课文导入部分出乎意料的设计，能够引起学生极大的兴趣，因而他们在阅读课文时就不会感到枯燥，即使有困难如部分生词也能积极去克服和思考。值得一提还
2、有两个课时的作业布置都是基于课堂活动内容，既是对所学内容的小结也是课堂活动的延续，而且这也符合新课标所倡导的教育教学理念。 学科： 英语 设计教师：厦门市东山中学 许月浅 Period 1： Warming up and speaking of UNIT3 COMPUTERSTeaching aims and demands：1. To learn some common knowledge about computer.2. To study some new words and expressions.3. To practice the students English speaking
3、.Important points：To learn some common knowledge about computer and to study some new words and expressions.Difficult points： Some new words and improve the students spoken English Teaching methods： Situational way and Task based approachTeaching aids： Multi-media, and projectorHomework Write a shor
4、t passage to tell people what are the advantages and disadvantages of computer.Teaching procedure notesStep 1 Lead in 3 minutesShow the ss a picture where a man has fallen into a computer. Ask the ss why the man is so crazy. The ss may give various answers. Then the teacher summarizes like that:T：Ye
5、s. As we all know that computer now is playing an important role in our life. We cant imagine what life will become without computer, especially when we are in the 21st century where computers are applied in many fields.Now lets come to learn more about computer. Step 2 warming up 14 minutes1. Show
6、the ss some pictures about each part of computer, get the ss to name each part of it. The presentation goes from the easy one to the difficult ones that are not easy to name.( 4 minutes) 2. Introduce some people and computer words and expressions to the ss by showing them on screen: ( 5 minutes)Char
7、les Babbage(1791-1871), who made the first design of computerAlan Turing (1912-1954), who designed the first real computerArtificial intelligence, means man-made intelligenceTransistors: they are a way of sending and storing information that only take up a small space.A network: it is a number of co
8、mputers that are joined together so that they can share information.The 1970s: it was when computers became small enough to come into peoples homes.The Internet: a world wide information resource where people can do many things.3. WB.P 56 Listing words and expressions. Exercise 1. ( 5 minutes)Read t
9、hrough the words in the right-hand box below. Use some of them to name each part of a computer in the left-hand box. (Keys: 1.floppy disc; 2. chips; 3. monitor; 4. modem; 5.CD-ROM; 6. scanner; 7. key-board; 8. printer )Step 3 Speaking activity 14 minutesNow we have learnt much about computer. It is
10、really very (设计说明：用一张图片内容是一个人栽进电脑来夸张而形象地表明人们对电脑的痴迷程度,因此能够引起学生强烈的兴趣,借此机会让学生思考一下为什么, 他们会产生许多联想,然后老师再给予小结把话题引入,这就让人容易接受了。)(设计说明：先让学生边看一些简单的电脑零件边说出他们的名称,后在展示一些较难的不常见的,由浅入深介绍相关的电脑知识， 符合学生的学习心理过程。)(设计说明：通过大屏幕介绍与计算机发展有关的重要人物并进一步介绍电脑知识，让学生学习的更多一些，满足他们的求知欲。甚至可以让学生自己来举例。)(设计说明：与计算机相关知识介绍完后再及时以一道练习进行巩固，效果最好。)(
11、设计说明：进行口语活动之前先对前一个步骤进行小结和说明，以便important and it seems that we cant go without computer. Does it always go like that?I dont think so. You know people also lived a happy life before computer came into use. Look, here are some kinds of “computer” for you to have a look.( 1 minutes)1. First look at the p
12、ictures on page 17. and think about three questions: (3 minutes) What do they have in common? (explain “ have in common” means share the same points)What are the differences between an abacus and a calculator? What about a calculator and a PC, a PC and a notebook computer?2. Then get the ss to discu
13、ss them in groups .They may have various answers. Thus ask one student of each group to record what answers they have when they are discussing. Collect their answers and show them by projector.( 3 minutes)Suggested answers；They all can be used to calculate numbers. An abacus is not so convenient as
14、a calculator for it is not easy to master. We can see a DVD on computer but not on a calculator. We can carry a notebook computer easily but not a desk computer. (2 minutes)3. Based on what they have discussed just now, ask them to fill in the following chart. Thus they can well prepare for the spea
15、king. ( 5 minutes) item advantages disadvantagesan abacusa calculatora PCa notebook computerSuggested answers；自然导入下一个步骤。)(设计说明：让学生先观察这四样工具，然后再讨论其有无共同点，这样才有的放矢。也为下文的讨论作好准备。)(设计说明：先让学生讨论然后再进行交流，能够帮助学生获取更多的信息，并且在交流的过程中让他们明白合作学习的重要性，也达到思想教育的目的。把讨论结果用幻灯片展示，以便学生互相对比。)(设计说明：先讨论后填写信息，这样在有文字准备的基础上进行进一步的讨论时，学
16、生对讨论的内容就会更清楚，避免了无的放失。)item advantages disadvantagesan abacus Easy to make:need no electricityHard to master ,slowa calculator Easy to master, fastCant display VCD, etca PC Fast, can play VCD, get on net, etcDifficult to carry, need electricity, etca notebook computerEasy to carry, Fast, can play VCD
17、, get on net, etcThe battery cant last long, easy to get stolen, etc.Step 4 Discussion 10 minutes1. Divide the whole class into four groups, each group discusses a topic. (5 minutes) The topics are:A. When you do mathematical exercises, which one will you choose? Why? Which one will you not choose?
18、Why not?B. When you want to get on net, which one will you choose? Why? Which one will you not choose? Why not?C. When there is no electricity and you have to do some calculating, which one will you choose? Why? Which one will you not choose? Why not?D. When you are on a long travel, which one will
19、you take with you to kill time? Why? Which one will you not choose? Why not?They can use the following to express themselves.I think that ；In my opinion ; I believe that; Whats your reason?; Why do you think so?2. Ask one pair of each group to tell the class what result they have got. (5 minutes) St
20、ep 5 Summary 3 minutesT：Today we have learnt something about computer. Can you tell me what they are？ Who would like to have a try？T：If you want to know more information about it, you can surf the internet to get it. Think about how computer came into being, and is it developed in a short period? An
21、d what computer is applied.(设计说明：给出 4 种情景让学生分组进行，然后再交流，以充分利用他们讨论的全部信息，学生将再一次感受到互相交流的好处，从而更愿与人合作。)(设计说明：以提问的形式提醒学生今天所学的内容，如果学生能够当堂回答，则表明他们的学习效果不错，如果不能，那么老师需要给予帮助，以利对教学效果进行反馈。)（设计说明：用于巩固今天所学）Homework 1 minuteWrite a short passage to tell people what are the advantages and disadvantages of computer. Pe
22、riod 2：Reading of UNIT3 COMPUTERS：Who am I ？Teaching aims and demands：1 To understand the development of computer2 To practice the students reading skills3 To get the students understand the importance of study information technology.Important points：To understand the development of computer and to
23、practice the students reading skillsDifficult points： To get the students understand the importance of studyTeaching methods： Situational way and Task based approachTeaching aids： Multi-mediaHomework SB P20 Exercises2-3Teaching procedure notesStep 1 Lead in 5 minutes1Get the ss to have a quiz：Can yo
24、u work out the answer in one second？1642+1822+1936+1960+1970=？点击进入：1642:Pascal built a mechanical calculating machine，mechanical gears, hand-crank, dials and knobs other similar machines followed.1822: The Analytical Machine was made by Charles Babbage.1936: Alan Turing wrote a book to describe how
25、computers couldbe made to work.1960: Computers had new transistors and became smaller.1970s:Computers were brought into peoples homes.Now : Computers connect people all over the world together. 2No matter what is their answer，tell the ss your answer is ：1642+1822+1936+1960+1970=the development of co
26、mputerYou may feel surprised to the result, but when you read the text “who am I”, you will understand it. Lets read the passage now. Step 2 Fast reading: 6 minutesScan the text on Page 18, and judge the following sentences whether they are True or False. 1. I was made as a calculating machine in 16
27、42 in France.(T)2. In 1822 I was built to follow instructions from cards with holes, which was a technological revolution. (T)3. Alan Turing wrote a book to describe how computers could be made to work in 1936.(T)4. In the 1960s after I got my new transistors my size was not changed.(F)5. In the 197
28、0s I was brought into peoples homes.(T)Step 3 Careful reading : 10 minutesRead the text carefully and try to find out the answers to the questions:(说明：这些数字是与计算机发展密切相关的几个年份，并将设置按钮通过大屏幕对这些内容进行进一步介绍。 ）（设计说明：在英语课上出现计算题，学生会觉得意外，而当他们兴致勃勃地算出答案时，老师再给出自己的答案，这会让他们更加吃惊，因为老师的答案似乎违背常理，这就引起了他们强烈的兴趣。导入新课的目的也就达到了。学
29、生会要求老师多介绍一些内容，那么老师可再点击这些数字上的按钮，顺便分别介绍这几个年份和计算机发展有关的背景资料，以便学生了解的更多。 ）（设计说明： 通过让学生快速浏览全文，既能让他们迅速了解文章大意，而且也锻炼了他们的阅读技巧。这些是非判断题的设置内容是文章几个重要年份所发生的与计算机发展密切相关的事件，我们可以看到这些问题的描述只有第 4 题是错误的，为什么呢？因为我们的目的就是要让学生了解大意，遵循由浅入深的原则。 ）1. What made people think I was not simple-minded?(I had “artificial intelligence” whi
30、ch made people think I was not simple-minded.)2. Who built a “universal machine” to solve any mathematical problem?( Alan Turing)3. How people deal with information and communicate with each other around the world since 1970s?( By the Internet)4. Who am I? Find out the supporting sentences.Key: It i
31、s a computer because it describes:A. Then in 1822 I was built as an Analytical Machine by Charles Babbage.B. My real father was Alan Turing.C. However, people thought I was simple-minded until they discovered I had “artificial intelligence”. Step 4 Discussion 5 minutesGet the ss to discuss how the t
32、ext was organized.T: How was so much information given in such a short space?S: The writing is neat and clear. There are no waste words. It just gives us facts in the order of time. It is written in the first person, which will interest the readers. When the reader reads it, he will not feel it bori
33、ng. It is written naturally as it happens.T: Good. When we should write down what we see and what we find, remember to have a chronology of the matter. Then we can have it neat and clear.Step 5 Useful words and expressions 13 minutes1. Get the ss to underline what they think are useful and play the
34、tape of the passage for them to listen to. They can be words, expressions and sentences. Here are some :begin as, a calculating machine, be built as, follow instructions from, sound simple, a technological revolution, (设计说明：第二次阅读所设置的问题就是一些细节题，但不是以选择题的形式出现，这主要是要发挥学生学习的主动性，特别是第 4 题，要学生找出答案的对应句或支撑句，从一个
35、侧面考验了学生的阅读理解能力。 ）（设计说明：本步骤要让学生通过讨论文章的组织脉络，来发现本文是按照时间顺序来写的，这样在写作上当他们碰到类似的问题时，也会学着按照时间顺序来组织文章。同时，这也给学生提供了一次使用英语的机会。 ）（设计说明：通过听的形式再次回顾全文并画出重要单词和词组，以便学习和记忆，makework, solve problems, simple-minded, artificial intelligence, go back to, the size of, go by, get quick, stand there by oneself, be connected by
36、, share information by, talk to, bringinto, be not close enough, communicate with, serve the human race. Then get the ss compare what they have found. And make sure the ss can understand the words and expressions above by asking some ss to translate them into Chinese. 2. SB. Page 19. Discovering use
37、ful words and expressions, exercise 1. Tell the ss to find the words and expressions with the following meaning from the text 3. Explain the word-simple-minded.simple-minded: showing very little intelligence 头脑简单的；笨的e.g.：Many people think him simple-minded, but in fact he is very clever.结构相同的复合形容词还有
38、：absent-minded, 心不在焉的; open-minded， 虚心的，没有偏见的; narrow-minded， 心胸狭窄的; single-minded， 一心一意的; strong-minded 意志坚强的; weak-minded 低能的愚蠢的; etc.Step 6 Summary 5 minutesFirst ask the ss to make a summary of the text orally using the words and expressions above. They can prepare by themselves and they had better write it down. Finally exchange and compare their summaries to see how well they have done. Homework：SB P20 Exercises2-3 1 minute 并为下一步写好文章的概要作了准备。 ）（设计说明：关于文章的重要词汇在上一步骤中已经有涉及，现在辅以适当的练习能更好地对知识点进行巩固。 ）(设计说明: 重点解释simple-minded 这个词，并附带介绍与之相同结构的复合词，能帮助学生举一反三。)（设计说明：让学生以写的形式把今天所学巩固下来，以便学生自查。 ）
