unit3 computers
period 2 warming up and pre-reading
教学设计
i. teaching contents：warming up and pre-reading
ii. teaching aims：
1）to inspire students with strong interest in the computers and improve students’ english ability.
2).learn how to describe different kinds of computers in english.
3). to learn and remember the following words: abacus; calculator; pc; laptop; pda; robot; development; universal;
iii. key points & difficulties
key points
talk about the development of computers.
difficulties
remember the new words.
iv. teaching procedure:.
step i : greetings
the teacher greet the whole class.
step ii: words preview:
teacher lead the students preview some new words of this unit.
step iii: warming up
1.warming up by guessing the riddles.
(1). i am very old now. i was born in china. many people used me for calculating in the past, but now i am a bit lonely because they don’t like me now.
(2). i can be used for calculating. besides, i can also be used for watching dvd, sending e-mail and communicating through the internet. however, i am not a pc, because i’m small enough for you to take me with you.
(3). i am so small in size that i can fit in your hand. i usu
