Unit 1 Great Scientists教案

unit 1   great scientists
period 1  warming up & pre-reading
teaching aim:
to learn something about some famous scientists
teaching procedures:
step 1 lead-in
1. can you name some famous scientists?
2. in your opinion, what qualities should a scientist have?
(common characteristics: bright/ brightness; creative; cautious; persuasive; strict; positive; co-operative; enthusiastic; etc.)
3. what kind of scientists do you know?
(geologist; geographer; mathematician; physicist; chemist; agriculturist; astronomer; botanist; biologist; inventor …)
step 2 warming up
1. page 1, sb. ask ss to finish the quiz and find out who knows most.
2. show some pictures of these great scientists and have a brief introduction to them.
step 3 pre-reading (discussion)
1. what do you know about infectious diseases? what kind of infectious diseases do you know?
(infectious diseases can be spread easily, they have unknown cause and may do great harm to people. sars; bird flu; aids; etc.)
2. what do you know about cholera? (t can introduce this disease by using slides)
3. do you know how to prove a new idea in scientific research? discuss in small groups the stages in examining a new scientific idea. what order would you put them in?
(find a problem→make up a question→think of a method→collect results→analyse the results→repeat if necessary→draw a conclusion)
step 4 language points
1. discover   vt. to be the first to find, learn of, or observe 發現，發覺
discover 通常指被探索或被揭示物早就客觀存在著；invent指的是發明原先不存在的東西。如：
columbus discovered america in 1492.
alexander graham bill invented the telephone in 1876.
2. as   conj.
used in comparisons  用于比較：像……一樣
he’s as old as i am.
in the same manner or way that 照……的方式
do as i say.
while; when
he saw her as she was getting off the bus.
because
as she has no car, she can’t get there easily.
though
tired as i was, i tried to help them.
as it is: in reality; in fact 事實上
i hope things would get better, but as it is they are getting worse.
(7) as it were: so to speak; in a certain way 可以說; 跟……一樣
he is my best friend, my brother, as it were.
3. characteristic
(1) n. a special and easily recognized quality of someone or something 特色, 特性
a characteristic of this animal is its ability to live for a long time without water.
(2) adj. typical; representing a person’s or thing’s usual character 獨特的
i heard my friend’s characteristic voice.
4. the way of doing sth. 意為“做……的方法”，還可以表達為 the way to do。如：