人教新课标高一英语必修2 Unit3 Computers period 1教案

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1、Part 1 Teaching Design第一部分 教学设计Period 1 A sample lesson plan for reading(WHO AM I?)Introduction In this period, after the warming up, students will first be guided to understand how computer works. Then they will be helped to read a narration about computer and its development. Three examples of “Wa

2、rming up” designs are presented for the teachers reference. Computer and overhead projector may be used to aid the teaching and learning. Objectives To help students learn to make decisions and to reason in English To help students learn to read an introduction about computer To help students better

3、 understand “the computer science” To help students learn to use some important words and expressions To help students identify examples of “the present perfect passive voice” in the textFocusWords solve, explore, arise Expressions fromon, as a result, in a way, with the help of, deal with, watch ov

4、erPatterns Over time I have been changed quite a lot.As a result I have totally changed my shape.I am now truly filled with happiness that I am a devoted friend and helper of the human race!. AidsMultimedia facilities, tape-recorder, photos, diagrams Procedures1. Warming up Warming up by talking abo

5、ut computerLook 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 keeps knowledge in its memory and does work on that knowledge. This knowledge is kept in symbols; it is called data. A computer usual

6、ly has a monitor to show results. However, some computers can speak; these computers can be used for voice mail. Warming up by learning some computer jargonsJargons are terms used by some special people. These are some of the computer jargons. Computer jargon 计算机行话CPU - Another name for processor, D

7、ata - Information stored on a computer, Disk - A place to store data, Email - Electronic mail, Load - Get data from a disk, Save - Put data on a disk, RAM - Memory, the more the better, USB - A method to plug computer tools into machine, WWW - World Wide Web, part of the Internet Warming up by getti

8、ng to know what a computer virus is.Computer viruses (病毒)are small software programs that are planned to spread from one computer to another and to do harm to computer operation. A virus might harm or wipe out data on your computer, using your e-mail program to spread itself to other computers.Virus

9、es are most easily spread by e-mail messages. That is why it is important that you never open e-mail unless you know who its from and you are expecting it.Viruses can be made to look like funny images, greeting cards, or audio and video files.Viruses also spread through downloads on the Internet. Th

10、ey can be hidden in software or other files or programs you might download.To help avoid viruses, its essential that you have the latest updates and antivirus tools, stay informed about recent threats, and that you follow a few basic rules when you surf the Internet, download files, and open attachm

11、ents. 2. Pre-reading by talking about how computer works How does a computer work?A computer has four main parts: the arithmetic and logic unit (ALU), the control unit, the memory, and the input and output devices (collectively termed I/O). These parts are interconnected by groups of wires. The cont

12、rol unit, ALU, registers, and basic I/O (and often other hardware closely linked with these) are collectively known as a central processing unit (CPU). Early CPUs were comprised of many separate components but since the mid-1970s CPUs have typically been constructed on a single integrated circuit ca

13、lled a microprocessor.3. 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.4. Reading aloud and underlining expressionsNow we are to read the tex

14、t once again and underline the expressions in the text. Jot them down into your notebook after class as homework.Collocations from WHO AM I?be built as, follow instructions from, sound simple, at the time, a technological revolution, solve problems, become huge, had artificial intelligence, go by, c

15、hange size, become small and thin, get quick, stand there by oneself, be connected by, share information by, deal with, communicate with, serve the human race5. Reading and transferringScan the text for information to complete the flow chart below, describing the development of computer.a calculatin

16、g machine in 1642 in France an Analytical Machine in 1822 a “universal machine” in 1936 the size of a large room made smaller and smaller getting new transistors in 1960s clever and quicker a network in the early 1960s talking to humans using BASIC in the early 1960s brought into peoples homes in 19

17、70s Internet6. Reading to get the general idea of the Type of writing and summary of WHO AM I?Type of writing This is a piece of narrative writing.Main idea of the passage It tells about the birth and development of computer.Topic sentence of 1st paragraph I began as a calculating machine in 1642 in

18、 France. Topic sentence of 2nd paragraph Since the 1970s, my memory improved.Topic sentence of 3rd paragraphSince the 1970s many new applications have been found for me. 7. Retelling the text Try to retell the text in your own words with the help of the flow chart or “the Type of writing and summary

19、 of WHO AM I?” above. A retold version of the text WHO AM I?I, the computer, was a calculating machine in 1642 in France. Then I was built as an Analytical Machine in 1822. I became a “universal machine” in 1936, the size of a large room. After that I was made smaller and smaller. Getting new transi

20、stors in 1960s I became clever and quicker. I was connected with other computers and turned out to part of a network in the early 1960s. Then I began talking to humans using BASIC in the early 1960s. In 1970s I was brought into peoples homes, and came the Internet.8. Closing down by doing a quizFill

21、 in the blank with one word to complete the summary of the text.In order to understand how a computer really 1 _ , we first have to examine what it really means for a system or device to be “digital“. All being digital 2 _ is that a system stores and operates on information in a very specific 3 _. I

22、n a digital system, every piece of information is stored in a bit (or multiple collections of bits). A bit is a variable 4 _ can have only one of two values: it can either be a 1, or be a 0. The easiest 5 _ to think of a bit is as a container - this container is either completely 6 _ or completely e

23、mpty, but never anything in between. A full container can be thought of as a 1, 7 _ empty container as a 0. The beauty of this is that any piece 8 _ information can be represented as a collection of bits. The way this is done is by making each bit the 9 _ to a yes or no question. For example, lets s

24、ay I wanted to know whether a person has long hair 10 _ not. I could represent this piece of information by deciding that if the 11 _ has long hair, I will set a certain bit to be a 1. If the person doesnt have long hair, I will 12 _ that same bit to be a 0. As long as you followed the same conventi

25、on, you could look at the 13 _ bit that I just set and know whether the person has long hair or not, even if you had 14 _ seen them before.(Keys: 1 works 2 means 3 way 4 that 5 way 6 full 7 an 8 of 9 answer 10 or 11 person 12 set 13same 14 never)Work out the word and structure questions.1. As the da

26、ys _ gone by, I have been made angrier and angrier.A: had B: have C: has D: having2. There were weeks _ she liked to go back into her history.A: that B: where C: when D: how3. I hope I could share views _ others.A: to B: with C: among D: for4. Computer is an electronic machine for storing and _ information, and for communicating with others.A: dealing B: ordering C: searching D: organizing(Keys: 1 B 2C 3 B 4 D)