人教版高中英语必修2教案Unit 3Computers.docx

1、人教版高中英语必修2教案Unit 3 Computers人教版高中英语必修2教案Unit 3 ComputersThe topic of this unit are information technology，history and basic knowledge of computers and robots。 The main theme is computers which is connected with teaching students a little more of the history and development of computers and applicati

2、ons computers will be vital to the modernization of China.It is important for students to understand that the development of computers has been a very recent thing which has only been 100 years since Charles Babbage began to make his first machine that was the predecessor of the personal computers w

3、e use today. Understanding the history of computers will help the students to see that there will be many changes ahead in the development of computers and arouse students interest in learning computers.New words and collocations: calculate, universal, simplify, sum, operator, logical, technology, t

4、echnological, revolution, artificial, intelligence, intelligent, solve, reality, personal, tube, total, net work, web, application, finance, mobile, rocket, explore, anyhow, goal, happiness, download, virus, signal, type, coach, arise, electronic, appearance, character, mop, niece, from.on, as a res

5、ult, so that, human race, in a way, with the help of, deal with, watch overAbility aims: arouse the students great interest in learning computers and let them learn to use them in their daily life.Difficult points: how to develop students reading skills, express their opinions and use personificatio

6、n and chronology when writing.Important points: let them learn more about the history and basic knowledge of computers and different reading skills.Step 1 Leading in the topic1. Show them some pictures of an abacus, a calculator, a huge computer, a laptop and a PC. In some groups, discuss what they

7、have in common, and then rank them according to the time of their appearance.2. Ask students to give their opinions and remind them of using the following expressions：I think that In my opinion, I believe that Whats your reason? Why do you think so ?3. Ask some students to talk about what they know

8、about computers.A chain of events showing the development of computers.A calculating machine in1642 in FranceAn Analytical MachineA “universal machine” in 1936The size of a large roomMade smaller and smallerClever and quickerA network in the early 1960sBrought into peoples homes in 1970sMany new app

9、lications since the 1970sToday Step 2. Predicting by talking free1. Ask students to look at the heading and picture to guess what the passage might be about.2. Ask some students to give their opinions by answering the question: How have computers changed our life? Do you know in what ways computers

10、are used today? Step 3. Reading1. Look at the picture and title to predict what the passage might be about？2. Read the passage fast for the topic sentence of each paragraph：ParagraphsTopic sentencesPara 1I began as a calculating machine in 1642 in France。Para 2My memory improvedPara 3Since the 1970s

11、 have been found for me3. Read the text carefully for the information to complete the table below, describing the development of computersIn 1642In 1936By the 1940sIn the early 1960s Since the 1970s Now4. 根据课文内容填空Parts Main ideas Details Part IThe development of computersIn 1642, the computer was bu

12、ilt as a(n) calculating machine.Two hundred years later, the computer was built as a(n) analytical machine by Charles Babbage.In 1936, Alan Turing said the computer could be worked as a “universal machine” to solve any difficult mathematical problem.By the 1940s, the computer was as large as a room.

13、Later, the computer became smaller and smaller.Since the 1970s, the computer has been used in offices and houses.The computer can share its knowledge with others through the websites. Part IIThe improvement of computers memoryThe memory of the computer was stored in tubes, transistors and very small

14、 chips.Its memory has grown a lot since the network appeared.Part III New applications of computersCommunication, finance and trade.Robots, mobile phones and medical operations.Space rocketsProviding the human race with a life of high quality.5. Read the text again to underline the expressions and w

15、rite down into their notebook after class as homework: begin as, a calculating machine, be built as, as that time, a technological revolution, artificial, intelligence, write a book, makework as, solve problems, from then on, in size, bothand, by the 1940s, go by, as a result, change ones shape, so

16、.that, be lonely, stand there by oneself, be connected by, share ones knowledge with, become important in, putinto., as well as, provide.with, be filled with, a devoted friend, the human race5. Listen to the text and skim the text once more and identify the difficult sentences. Let them try analyzin

17、g the structures of them. Step 4 Interview gamesAsk students to work in pairs. Suppose one is a journalist and the other is a computer, the journalist is interviewing the computer.Step 5 Learning personification and chronologyPersonification means to treat something as if it were human or had human

18、qualities. It is of the most effective ways of using words figuratively. Chronology means to describe things in order of time which is often used in recounting an event or describing the life of someone. It is an effective way to make a mass of things clear.An version:I, the computer, was a calculat

19、ing machine in 1642 in France. Then I was built as an Analytical Machine, which was a technological revolution. I became a “universal machine” in 1936 to solve any mathematical problem. I was not very big at first then I became huge, the size of a large room before I was made smaller and smaller.I b

20、ecame clever and quicker and was connected with other computers and turned out to be part of a network in the early 1960s. I was brought into peoples, and many new applications have been found for me. Step 5 Closing down by spoken practiceTalk about the development of computers by answering the ques

21、tions:1). Do you have your own computer at home?2). How familiar with computers do you think you are?3). How many times do you access the Internet newspaper in a week?4). How many times do you access the World Wide Web in a week?5). How many times do you send the e-mails in a week?6). How many hours

22、 do you spend in internet “chat” group in a week?7). Do you think the commercial services on the net are reliable?8). In general, how positive or negative an experience is it for you to work with computers?9). In general, what effects do you think the computer technology has had on your study?10). I

23、n general, what effects do you think the computer technology has on human societies and cultures? Step 6 Homework1. Go over the text, and try to learn all the useful words and expressions by heart2. Finish the exercises in comprehending on page 19. Artificial intelligence means man-made intelligence

24、 while “real intelligence” is the intelligence that human that human beings are born with. The term “artificial” includes all the calculations that a computer can do. It is different from human intelligence because it only works with electricity and can be turned off when the machine is unplugged fr

25、o the wall.Transistors are a way of sending and storing information that only take up a small space. They meant that computer could be made smaller and they led to computers becoming small and personal.A network is a number of computers that are joined together so that they all show the same program

26、. So a number of students can work in the same room on the same program but at different computers.The Internet (WWW) is a worldwide information resource where people can do research, go shopping or sending messages to friends. When they send messages they do it by “e-mail” or “electronic mail”. The

27、 messages are sent by satellite to special place on the ground that can receive them. Them they are sent to the address where the person can open them and read them like a letter.The 1970s was when computers became small enough to come into peoples homes. These computers are called “personal compute

28、rs”.The second period: Learning about important language pointsKnowledge aims:1. Get students to learn and grasp the important useful new words and expressions: calculating, calculator, PC, laptop, common, simplify, simple-minded, artificial intelligence, anyhow, totally, network, truly, race, birth

29、, go by, deal with, human race2. Important useful sentence patterns: 1) I began as a calculating machine in France in 1642. 2) As time went by, I was made smaller and smaller. 3)And my memory became so large that even I couldnt believe it.3. Ability aims: Get students to use some useful new words an

30、d expressions correctly.4. Emotion aims: Stimulate students interest in learning English and the spirit of cooperation.5. Important points: Enable them to grasp the usages of such important new words and expressions as common, any how, in common, in ones opinion, deal with, etc.Get them to master th

31、e pattern “And my memory became so large that even I couldnt believe it.”6. Difficult points:How to get the students to master the usages of the important expressionsGet students to understand some difficult and long sentences.Step 1 RevisionCheck the homework exercises.Ask some students to retell the development of computers.Step 2 Vocabulary study1. Ask students to fill in the form according to the requirement.n.adv.calculatecalculatortruetrulytechnologicaltechnologypersonalpersonallyintelligentintelligencetotaltotally2. Review the new words and expressions in all the parts and have a d