新课标高中英语必修2 Unit 3 Computer 全单元教案.docx

1、新课标高中英语必修2 Unit 3 Computer 全单元教案新课标高中英语必修2 Unit 3 Computer 全单元教案M2 Unit3ComputerPeriod 1:Warming up (WHO AM I?) Warming up This section is an introduction to the topicIt is to get the students thinking about the different ways computers can be madeDo this part of the lesson in pairs and as a speakin

2、g activityWarming up by talking about computer Look at the pictures on page 17. What are they? What do they have in common? Yes, they are computers. Then what is a computer? A computer is a machine which stores knowledge in its memory and does calculations on that knowledge. This knowledge is stored

3、 in symbols; it is called data. A computer usually has a monitor to show results. However, some computers can speak; these computers can be used for voice mail. Draw on the blackboard a diagram to illustrate the influence of the computer and the Internet over the school educationBelow is a diagram y

4、ou may like to useAsk students to look at the diagram and consider, ”What changes have computers and the Internet brought to schools? What changes will they bring to schools in the future?”Ask the Ss to work in groups and to make a list of the possible changes they can think ofWhen most of the group

5、s have their lists ready, the teacher can hold a class discussionWrite down the major changes the students think of under / beside the diagramThe teacher can add one or two changes that may affect their own teachingFor example, “Computers and the Internet can help busy parents contact teachers by em

6、ail”The teacher can end the task with a brief summary, or hold a further discussion to find out students personal opinions about the changesFor example, ask them, “Do you like all these changes? Why and why not? What changes do you like / dislike?”Some information:计算机室 A computer frequently requires

7、 a boot device. The boot device contains the computers operating system and data. Computer programs can be installed onto a computer. Some people think that computers are less useful if they do not have access to the Internet. They think this because the Internet allows the computers to send and rec

8、eive data and email across the world. 曙光3000巨型计算机 A computer is now almost always an electronic device. It usually contains materials which are toxic; these materials will become toxic waste when disposed of. When a new computer is purchased in some places, laws require that the cost of its waste ma

9、nagement must also be paid for. This is called product stewardship. In some countries old computers are recycled (melted down) to get gold and other metals. This is dangerous, because this procedure releases the toxic waste into the water and soil. Computers become obsolete quickly. Very often they

10、are given away and new ones replace them within two or three years. This makes the problem worse. Computer recycling is thus common. Many projects try to send working computers to developing nations so they can be re-used and will not become waste as quickly. Computer jargon 计算机行话 Computer jargon me

11、ans words to do with computers and surrounding topics. Knowing what these words mean can help you know more about computers. Some people use these words to impress other people (Also known as buzzwords). Examples of jargon: Bit - The smallest data unit, can either be a “0.” or a “1.”. Byte - unit of

12、 data. See also Kilobyte, Megabyte, Gigabyte and Nibble CPU Central Processing Unit, Another name for processor Data - Information stored on a computer Disk - A place to store data. Email - Electronic mail. GHz - Gigahertz. Used often incorrectly to describe the speed of a processor. But with some 2

13、.4 GHz processors faster than 3.6 GHz ones, it is clear that it is just a salesman trick. Load - Get data from a disk Nibble - Half a Byte Save - Put data on a disk RAM random-access memory(随机存取存储器), the more the better. USB - Universal Serial Bus（通用串行总线，一种简化了插接多种附件的薄型插座） WWW - World Wide Web, part

14、of the Internet Period2-3 Pre-reading & Reading Pre-reading This can be a continuation of the Warming UpLet the students discuss the questions set out in the Students Book1. Questioning and answering What do you know about computer? Electronic machine capable of performing calculations and other man

15、ipulations of various types of data, under the control of a stored set of instructions. The machine itself is the hardware; the instructions are the program or software. Depending upon size, computers are called mainframes, minicomputers, and microcomputers. Microcomputers include desk-top and porta

16、ble personal computers. A multi-function electronic device that can execute instructions to perform a task. A device that accepts information, processes it, and supplies an output. A computer usually contains memory, a control unit, arithmetic and logical units, and a means for input and output. a p

17、rogrammable hardware component that is controlled by internally stored programs and that can perform substantial computations (including arithmetic and logic operations) without human intervention. A computer typically consists of one or more processing units, memory units, and associated peripheral

18、 input and output devices. Related to automation and electronic data processing. The Library of Congress commonly classes most computer-related books in HF5548, QA75-76, Z52, T385, and some TK ranges. a machine for performing calculations automatically calculator: an expert at calculation (or at ope

19、rating calculating machines) A computer is a device or machine for making calculations or controlling operations that are expressible in numerical or logical terms. Computers are constructed from components that perform simple well-defined functions. The complex interactions of these components endo

20、w computers with the ability to process information. If correctly configured (usually by, programming) a computer can be made to represent some aspect of a problem or part of a system. If a computer configured in this way is give 2. Discussing and sharing How have computers changed our lives? Someda

21、y soon, if you havent already, youre likely to plug into the computer network nation growing in our midst. Computer terminals, or small computers connected via modem (a modulator/demodulator circuit for encoding/decoding computer chatter) to ordinary telephone lines, should be as ubiquitous as the t

22、elephone itself. Theyre a much more useful and humane tool than the phone, and with corporate America behind them the networks will be everywhere-changing our lives more than any technology since the automobile. Joining a computer network is the same as joining a community. Small systems are like vi

23、llages, where new members are formally welcomed. The larger networks, the Source and CompuServe, for example, are cities-anonymous, full of life and events, but difficult to fit into. II. Reading This is the purpose of the reading and so it is important that the students learn to use all the clues i

24、n the text to help them understand the gist of what they are readingSo encourage them to look at the pictures and the heading and guess what the text might be aboutThen ask the class to read the passage silentlyMake sure the students have the chronology of the development of computers in their minds

25、Ask them: 1. Listening and reading to the recording of the text WHO AM I? Turn to page 18 and listen and read to the recording of the text. Pay attention to the pauses, pronunciation and intonation of the native reader. 2. Reading aloud and underlining expressions Now we are to read the text once ag

26、ain and underline all the expressions in the text. Put them down into your notebook after class as homework. Collocations from WHO AM I? begin as, a calculating machine, be built as, follow instructions from, sound simple, at the time, a technological revolution, write a book, makework, solve proble

27、ms, become huge, had artificial intelligence, go back to, the size of, go by, change size, become small and thin, get quick, stand there by oneself, be connected by, share information by, talk to, bringinto, deal with, communicate with, serve the human race 3. Reading, identifying and settling Atten

28、tion, please! It is time to skim the text one more time and identify the difficult sentences. Try analyzing the structures of the difficult sentences and discuss them among your group members. You may also put your questions to me for help. Chat （online）（在线）聊天 To chat is to talk about ordinary thing

29、s that are not very important. You can chat to one person or to many people. People also use this word now for parts of the Internet where we can talk with many different people at the same time. Usually, you chat on the internet in a chat room or messaging service like AOL(American On-Line) Instant

30、 Messenger (AIM), Yahoo Messenger, or MSN Messenger. IV. Closing down by doing comprehending exercises Turn to page 18 and in pairs do the comprehending exercises No. 1 and 2. Reading and transferring Scan the text for information to complete the table below, describing the development of computer.

31、In 1642 In 1822 In 1936 In 1960s In 1970s Answer key: 1642: The computer began as a calculating machine1822: The Analytical Machine wasmade by Charles Babbage1936: Alan Turing wrote a book to describe how computers could be made to work1960s: Computers had new transistors and became smaller1960s: Th

32、e first family of computers connected to each other1970s: Computers were brought into peoples homesNow: Computers connect people all over the world together V.Explanation1in common: for or by all of a group 共同的；共有的；共用的。in common 常常同have连用，如：have nothing in common 无共同之处have little in common 几乎无共同之处have something in common 有一些共同之处have a lot in common 有许多共同之处（1）You know, Dorothy, you and I have one thing in common（2）We just had nothing in common and I couldnt comm