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Computers
Step I Lead-in
Who played the music faster, Teo or Xu Zihang ?
2. Who played the music better,Teo or Xu Zihang?
What makes Teo work(Teo or a computer)?
Watch a video and understand
I think Xu Zihang is better than Teo at skills.
Lead- in
A computer makes Teo work.
Teo played the music two seconds faster than Xu Zihang.
Computers can operate the railways (like the underground).
Computers can also fly planes and spaceships.
Conclusion: Inside most of the machines, there are computers and the computers make them work.
abacus
calculator
Huge computer
desktop
laptop
PDA =personal digital assistant 掌上电脑
Robot
History of computers
Step II Pre-Reading
Learn a reading skill about sub-headings
A sub-heading usually tells us the topic of the paragraph(s) , it is at the beginning of the paragraph or the top of it.
Example:
________________
In the 1940s, the first computers were bigger than cars. Now computers are becoming smaller and better.
Some computers are tiny. You may be unaware of them. There is probably one inside your TV or washing machine. You depend on computers more than you realize.
A. What can we do with computers?
B. Smaller and better.