外研版必修3Module4學案
t: excellent! now turn to page40.
step 2 task
the purpose of this writing task is for the students to design a poster that encourages people to look after the environment.
t: read through the passages that we have read in this module and find out seven things you can do in your everyday life for environmental protection.
t: have you found them?
s1: we should put waste paper in a special bag in order to recycle it.
s2: we should try to avoid using plastic bags.
s3: we will put our leftover food into a special can.
s4: i won’t step on the grass any more.
s5: i won’t catch the bird.
s6: i will persuade people who smoke not to smoke.
s7: i will join an organization that protects the environment.
t: now prepare a large piece of paper. think of a heading for your poster.
(the teacher goes around the classroom to help students)
t: now show your headings to the whole class.
s1: save our earth
s2: save the birds
s3: keep off the grass
s4: no smoking
s5: leftover food here
t: now complete the poster with a few sentences using pictures if necessary.
(ask several students to show their posters)
show sample poster:
save our earth
plant trees every year.
keep off the grass.
ride a bike or walk to work or school.
no smoking.
don’t throw away rubbish.
step 3 writing
ask students to read the message on an internet environment discussion group and find out the detailed information. then write a message to the internet environment discussion group to show your opinions about an environmental problem.
t: now read the message and answer the three questions on top of page90, activity17.
(after read the passage)
t: have you found the answers? now we’ll check the answers. now we’ll come to activity18.
first you should choose a topic and then follow the instructions to write a message.
step 4 suggested message:
i’m very concerned about global climate change. it’s a very serious global problem today.
from what i understand, there are many factors for global warming. the doubling atmospheric carbon dioxide, a greenhouse gas, would cause rising ocean temperatures, which will cause an increase in evaporation. the added water vapor, also a greenhouse gas, will enhance the greenhouse effect, which would further increase global warming.
there is evidence that for nearly two hundred years our planet has been warming. this is seen not only in climate observations, but also in some physical and biological indicators of environmental change. some scientists, supported by concerned environmental organizations such as greenpeace and the world wild life fund, have concluded that many of the patterns associated with this warming can be attributed to the growing impact of human activity on the planet.