说课 COMPUTERS

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Unit3 Computers

一、拓展性教学活动

Step1 Draw on the blackboard a diagram to illustrate the influence of the computer and the Internet over the school education．Below is a diagram you may like to use．

Step 2 Ask 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?"

Step 3 Ask them to work in groups and to make a list of the possible changes they can think of．

Step 4 When most of the groups have their lists ready, the teacher can hold a class discussion．Write down the major changes the students think of under / beside the diagram．The teacher can add one or two changes that may affect their own teaching．For example, "Computers and the Internet can help busy parents contact teachers by email．"

Step 5 The teacher can end the task with a brief summary, or hold a further discussion to find out students' personal opinions about the changes．For example, ask them, "Do you like all these changes? Why and why not? What changes do you like / dislike?"

二、自我评价建议

（一）非测试性评价

1．To what extent are the computer and Internet becoming part of your life?

I use the computer and / or Internet to:

□ type my homework．□ draw pictures．□ play games．□ communicate with my friends．

□ gather related information for my lessons．□ buy the things I like, e.g. books and clothes．      □ listen to music．    □ watch movies．

2．What else do you think the computer and Internet will help you to do?

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3．Which part（s）of the computer do you think need（s）more improvement? Why? You can use Exercise 1 in the Workbook （p 56）as reference for the parts of the computer．

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（二）测试性评价

Explain how the computer technology has been developing and complete the flow chart below．Then give a brief oral presentation on the development of computer technology with the help of the chart．When you're preparing it, you can refer to the reading passage on Page 18 of the Student's Book．Your oral presentation will be less than three minutes．Then write a short passage based on your oral presentation.

 

三、Teaching guide for the SB

WARMING UP

This section is an introduction to the topic．It is to get the students thinking about the different ways computers can be made．Do this part of the lesson in pairs and as a speaking activity．

PRE-READING

This can be a continuation of the Warming Up．Let the students discuss the questions set out in the Student's Book．

READING

This is a short history of the development of computers over the last 100 years．It introduces a lot of new and technical words, which are only used for computers （such as "artificial intelligence" or "network"）.

1　Teaching new words and structures

2　Understanding ideas

This is the purpose of the reading and so it is important that the students learn to use all the clues in the text to help them understand the gist of what they are reading．So encourage them to look at the pictures and the heading and guess what the text might be about．Then ask the class to read the passage silently．Make sure the students have the chronology of the development of computers in their minds．Ask them:

1　Who was the first person to devise the earliest computer?

2　What did he make and what did it do?

3　Who was the next important person to design computers?

COMPREHENDING

1　Three reasonable answers are acceptable, each of which needs a reason with it．The three possible answers are given below:

It is a computer because it describes:

●itself as the analytical machine designed by Charles Babbage （which was the first design of a computer）．"Then in 1822 I was built as an Analytical Machine by Charles Babbage

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●Alan Turing as its real father （and he designed the first real computer）．"My real father was Alan Turing ...."

●having artificial intelligence （which only computers have）．People have natural intelligence．"However, people thought I was simple-minded until they discovered I had 'artificial intelligence'."

2　Answer key:

1642: The computer began as a calculating machine．

1822: The Analytical Machine was made by Charles Babbage．

1936: Alan Turing wrote a book to describe how computers could be made to work．

1960s: Computers had new transistors and became smaller．

1960s: The first family of computers connected to each other．

1970s: Computers were brought into people's homes．

Now: Computers connect people all over the world together