Unit 3 Computer

Part One: Teaching Design (第一部分：教学设计)
Period 1: A sample lesson plan for reading
(WHO AM I?)
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 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 computers 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 access to the Internet. They think this because the Internet allows the computers to send and receive 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 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 releases 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 so they can be re-used and will not become waste as quickly.

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 buzzwords).
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 - Electronic 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 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 portable 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 programmable hardwarecomponent that is controlled by internally stored programs and that can perform substantial computations (including arithmetic and logic operations) without human intervention. A computer t
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