新课标必修2教案Unit3 Computers 综合教案

Teaching plan of unit 3 Computers

Teaching aims:
1. Topic
  Information technology; history and basic knowledge of computers; robots
2. Useful words and expressions:
 Calculate  calculator  PC  notebook  common  analytical  simple  simple-minded  technology  technological  revolution  universal  mathematical  artificial  intelligence  anyway  totally  network  truly  race  birth  IT advantage  disadvantage  type  disagree  choice  material  personally  create  coach  move  arise  brain  mop  wander
 In common   in one’s opinion   go by   so …that…
   deal with   human race   in a way  make up  after all
   with the help of  watch over
3. Functional items:
 a)Making decisions
  I think that…
    In my opinion…
    I believe that…
    Let’s make our decision.
    I’ve decided that…
 b)Reasoning
  The advantage/disadvantage is…
 I think this one is better because….
  I don’t think this one because….
  What’s your reason?
  Why do you think so?

4. Structures
 The present perfect passive voice
 I have been made smaller and smaller.
 I have been used by millions of people.
 I have truly been built to help the human race.

Teaching procedures

Period 1.  Speaking
Step 1. Warming up
 1. Ss talk about the pictures on page 17 with the teacher’s help.
 An abacus is an old calculating machine used in China until now.
 A huge computer is built to solve some mathematical problems. But it is too big.
 A calculator is a new calculating machine which can solve a large number of mathematical problems.
 A PC is a personal computer which can solve all kinds of problems and is used widely now.
 A notebook computer is a kind of useful computer which can be taken conveniently like a notebook.
 2. Now let’s discuss what they have in common in small groups. Remember to use some of the following expressions.
 I think that…
 In my opinion…
 I believe that…
 What’s your reason?
 Why do you think so?

Step 2. Listening (page 55)
 Ss are asked to read fast the requirement of Ex. 1 and 2 to fink out the listening points first. Then listen to the tape twice to complete Ex.

Step 3. Talking (page 56)
   Imagine that your family is thinking of buying a robot. You can afford these three robots mentioned in the listening text. Please discuss which one is the best for you. Remember to discuss the advantages and disadvantages of each one. Them make your choice and give reasons.
   Using the following expressions in discussion:
  I believe that….
  I think this one is better because…
  Let’s make our decision…
  In my opinion…
  I’ve decided…
  I don’t like this one because..

Period 2.  Listening

Step 1. Revision
  Ss talk about something about computers or robots.

Step 2. Listening and writing (page 21)
  Ask the Ss to read through the directions and look at some pictures below and a form above on page 22. make sure they know what to do while listening.
Task1.  Listen to a conversation about different kinds of information technology of IT.
Task 2.  Discussion and filling
   Ss discuss the advantages and disadvantages of each one in small groups and fill in the following form.
Type of IT Advantages Disadvantages
TV  
Web  
Radio  
Book  

Step 3. Listening task (page 58)
 1. Ss will be asked to look at the picture and the form quickly to find out the important points.
 2. Play the tape twice and ask the Ss to fill in the form.
          Sally and Brenda’s problems
About their jobs 
About changing their jobs 
About who decides their future 
About how they are different from people 
About how they are the same as people 

Homework
Ss discuss the use of computer chips in their spare time.

Period 3.  Reading
Step 1. Pre-reading
Ss in groups discuss the following questions:
 1. What do you know about computers?
 2. How have computers changed our lives?

Step 3.  Reading
 1. Ss read the passage and get the general idea.
(The text is mainly about the history and development of computers. And it is also about the relationship of computers and humans.)
 2.  Ss read the passage and finish the timeline on page 19.
 Suggested answer:
 1642: The computer began as a calculating machine.

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