最新高一+人教版+新课标+必修二+第三单元+Unit3+同步教案名师优秀教案.docx

1、最新高一+人教版+新课标+必修二+第三单元+Unit3+同步教案名师优秀教案高一 人教版 新课标 必修二 第三单元 Unit3 同步教案Unit 3 Computer 教学设计 Period 1: Warming up and reading Teaching Aims To talk about computer To read about computer Procedures I. Warming up Warming up by talking about computer Look at the pictures on page 17. What are they? What do

2、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 in symbols; it is called data. A computer usually has a monitor to show results. However, some compute

3、rs can speak; these computers can be used for voice mail. 计算机室 A computer frequently requires a boot device. The boot device contains the computer?s 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 acc

4、ess to the Internet. They think this because the Internet allows the computers to send and receive data and email across the world. - 1 - 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 disp

5、osed of. When a new computer is purchased in some places, laws require that the cost of its waste management 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 r

6、eleases the toxic waste into the water and soil. Computers become obsolete quickly. Very often they 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 s

7、o they can be re-used and will not become waste as quickly. - 2 - Computer jargon 计算机行话 Computer jargon means 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 bu

8、zzwords). Examples of jargon: Bit - The smallest data unit, can either be a “0.” or a “1.”. Byte - unit of 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 - Elec

9、tronic mail. GHz - Gigahertz. Used often incorrectly to describe the speed of a processor. But with some 2.4 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

10、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 of the Internet II. Pre-reading 1. Questioning and answering-What do you know about computer? ?Electronic machine capable of performing calculations and other manipulations of various types of d

11、ata, 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 portable personal computers. ?A multi

12、-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. - 3 - ?a programmable hardware co

13、mponent 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 input and output devic

14、es. ?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 operating calculating ma

15、chines) ?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 endow computers with the

16、 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? Someday soon, if you haven

17、?t already, you?re 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 telephone itself. T

18、hey?re a much more useful and humane tool - 4 - 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 villages, whe

19、re 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. III. Reading 1. Listening and reading to the recording of the text WHO AM I? Turn to page 18 and listen and read to the recordi

20、ng 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 again and underline all the expressions in the text. Put them down into your notebook after class as homework. Collocations fr

21、om WHO AM I? begin as, a calculating machine, be built as, at that time, a technological revolution, the start of artificial intelligence, write a book, be made to work, solve problems, from then on , grow any larger, As time went by, go back to,be made smaller, memory became so large, stand there b

22、y oneself, be connected by, share knowledge with others through, be put into, provide humans with, deal with, truly filled with 3. Reading, identifying and settling Attention, please! It is time to skim the text one more time and identify the difficult sentences. Try analyzing the structures of the

23、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 things 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 Intern

24、et where we can talk with many different people at the same time. Usually, you chat on the internet in a chat room or - 5 - messaging service like AOL(American On-Line) Instant Messenger (AIM), Yahoo Messenger, or MSN Messenger. IV. Comprehending 1. Scan the text for information to complete the tabl

25、e below, describing the development of computer. The computer began as a calculating machine. In 1642 The analytical machine was made by Charles Babbage. In 1822 The computer grew rapidly both in size and In 1936 in brainpower. The computer had grown as large as a room. 1940s The first family of com

26、puter was connected to each other. In 1960s Computers were used in offices and homes. In 1970s Computers connect people all over the world Now Together. 2. Read the text again and complete the chart below. Paragraph 1 Paragraph 2 Paragraph 3 Over time I have These changes only Since the 1970s Topic

27、been changed quite became possible many new applications sentence a lot. as my memory have been found for me. improved. , Calculating machine , tubes , communications Supporting , Analytical machine , transistors , finance details , Universal machine , chips , trade , PC , network , robots , laptop

28、, world wide web , mobile phones , space rockets , providing a life of high quality - 6 - Period 2: Learning about Language Teaching Aims: To learn to use The Present Perfect Passive Voice To discover useful words and expression To discover useful structures Procedures I. Warming up by reading to th

29、e tape To begin with, turn to page 18, listening to and reading to the recording of the text WHO AM I? Attention goes to the pauses and intonation, as well as the pronunciation of the reader. II. Discovering useful words and expressions In pairs do the exercises 1, 2 and 3 on pages 20. You must fini

30、sh them in 10 minutes. III. Learning about grammar 1. Passive VoiceOverview Tense or Model Passive Sentence Simple Present The TOEFL exam is given every six months. Simple past The TOEFL exam was given last month. Simple Future The TOEFL exam this year will be given on October15. Present Continuous

31、The TOEFL exam is being given every year. Present perfect The TOEFL exam has been given every year since 1950. Past perfect The TOEFL exam had been given before the Vietnam War occurred. Simple Modal The TOEFL exam should be given to every Foreign student. Past Modal The TOEFL exam should have been

32、given to all to enter US colleges. 2. The Present Perfect Passive Voice The structure of The Present Perfect Passive Voice is: have/ has ， been，ed - 7 - IV. Reading aloud and discovering Now go back to page 18 to read aloud and discover in the text examples of The Present Perfect Passive Voice. as a laptop, I have been used in offices and homes since the 1970s. Since the 1970s many new applications have bee