高中英语优质课评比获奖课件

Scanning（group work）:
1.Why are natural fertilizers better? 2.What problems are caused by using
chemical fertilizers?
3. What special ways of farming do
A summary (概括) of organic farming: no use of chemical fertilizers away from industrial areas away from dirty water supply no air pollution
Make a poster（海报）:
tell people what you are selling
make people believe your food is
good enough persuade people to buy your food make your poster as attractive as possible
safe food
green food ≈ organic food
safe or not ?
Skimming:
What is organic farming ?
growing crops with natural fertilizers rather than chemical fertilizers
3. What special ways of farming do organic farmers use? What organic farmers do Why do so?
Use natural fertilizers. Change crops every 2 or 3 years.
To make the soil richer. To prevent the soil from getting exhausted.
some special ways of farming to use
the food should be healthy and safe
吃动物怕激素；吃植物怕毒素； 喝饮料怕色素；能吃什么，心里没数。
－－－全国人大代表金志国 带到两会上的顺口溜
A quiz:
1. Organic food just refers to vegetables ห้องสมุดไป่ตู้nd fruits. 2. Green food has a color of green. 3. Green food is certain to be healthy and safe. 4. Organic food is free of chemical fertilizers. 5. Organic food is grown away from dirty water supply. 6. Green food can be grown around big paper factories.
Homework: 1. Design your posters and make them more attractive.
2. Sum up what you have learned in
this unit, including useful words, expressions and new grammar item.
Grow crops that need To prevent wind or water different levels of the from carrying away the soil in between. soil.
Suppose:
There is a big piece of field near your school. The school is planning to grow some green food in the field. Make a plan with your group members: What green food to grow and why? How to develop the soil? What special ways to grow it? What special ways to take care of your crop?
organic farmers use?
4. Why do the farmers do so?
Scanning（group work）:
1.Why are natural fertilizers better?
2. What problems are caused by using chemical fertilizers?