Science versus nature “Word Power”

teaching plan of “word power”
teaching objects:
1.      learn prefix and suffix and learn to guess meanings based on prefix and suffix
2.      learn organs of the body
teaching procedures:
i prefixes and suffixes
step i lead-in
appear, novel, regular, respect
we are going to have some questions. please use these words to help you, but you need to add some letters to the words first.
1)you cannot find your new pen. what happened to your pen?  it disappeared
2) many people respect mr. li and think he is a good man. he helps people out and is a good citizen and friend. so can you find a word to describe mr. li?
respectable
3) miss wang has published several books. she loves her job writing novels. so what is miss wang’s occupation(職業)?  she is a novelist
4) you cannot find the order of the numbers in a group of members. so can you find a word to describe the order of the numbers?  irregular
step ii introduction
independence
in    depend   ence
prefix(前綴) root (詞根) suffix(后綴)
prefix: a group of letters that is added to the beginning of a word to change its meaning.
suffix: a letter or a group of letters added to the end of a word to make a different word.
attention !
usually a prefix will change the meaning of word, while a suffix will change the part of speech of a word.
stepiii  prefixes
sometimes you can guess what a word means by looking at its prefix or suffix. look at the examples and work out the meanings.
prefix example  meaning
anti- anti-cloning, anticancer against, opposed to
dis-
un- disappear, disagree
unfair, unwilling not, apposed of
 
in-
il-
im-
ir- incorrect, incomparable
illegal, illogical
immoral, immodest
irresponsible, irregular                                 
not, without
 
pre- preview, preserve early, before
pro- pro-cloning in favour of, supporting
re- recreate, repeat, renew again
stepiv adding information
 some other commonly used prefixes
prefix example meaning
de- decompose, declassify apart, from
mal- maltreatment, malnutrition badly, ill
non- non-smoker, non-alcoholic, non-profit not
inter- international, interaction, interrupt between
tele- telescope, telegram, telecommunication far off
trans- transport, translate, transnational across