必修三模塊四 Sandstorms in Asia學(xué)案
period 7 writing (writing and task，page38)
the purpose of this writing is for students to describe one environmental problem and say what we should do about it. it’s a good opportunity for a discussion about the problems and the solutions. after the discussion, they can write down the problems and the way to solve them.
step 1 lead in
t: last class we have read some materials about environmental protection. do you know some major environmental problems?
s1: air pollution, petrol pollution, waste water and noise pollution.
t: ok. there are many types of pollution. but choose a major one around you and find out the solution to solve it. now discuss the problem in pairs and write down in a few sentences.
t: have you finished it? i’ll ask some of you to read your short passage.
s1: one major environmental problem is indoor air pollution. there are many sources of indoor air pollution. tobacco smoke, cooking and heating appliances, and vapors from building materials, paints, furniture, etc. cause pollution inside buildings. air pollution can affect our health in many ways with both short-term and long-term effects. so we shouldn’t stay in the room for a long time. we need to go outdoors to breathe fresh air and do some exercises.
s2: one major environmental problem is black carbon pollution.. black carbon pollution is the release of tiny particles into the air from burning fuel for energy. now it constitutes a serious and widespread problem, not only to human health, but also to the entire global environment. we must find a new and less-polluted energy to replace coal.
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