1、Evaluate chemical farming and organic farming n By the end of this period, you will be able to 1. know the difference between chemical farming and organic farming. 2. know the structure of an argumentative essay . 3. know the writing skills of an argumentative essay, such as illustrating, giving exa
2、mples or making contrast. 4. write an argumentative essay using what they will learn in this period. Step 1 Task 1 Making predictions 1.Look at the title of the passage and try to guess what will be talked in the passage. 2.If you were asked to write the passage under this title, what is your struct
3、ure? Chemical farming Vs Organic farming Chemical farming organic farming advantages disadvantages advantages disadvantages My choice/attitude organic farmingchemical farmingorganic farming organic farmingchemical farmingorganic farming Step II Test our prediction Read the text quickly and silently
4、and try to find what is the main idea of each paragraph. And then draw the map of the structure. Para.1 _ Para.2 _ Para.3 _ Para.4 _ Para.5 _ Chemical farming help fight crop disease and increase production. (advantage) Three disadvantages of chemical farming. (disadvantages) The definition of organ
5、ic farming and one of its advantages. (advantage) Other different methods of organic farming and their advantages. (advantages) The disadvantage of organic farming and show to the readers the attitude of the writer. (disadvantage not only.but also; in addition; in turn; in fact; as for; .,but.; ., a
6、nd.as well. Advantages: organic food are more nutritious and have much flavour. Farmers can get more money out of organic farming. Disadvantages:higher cost of producing food; greater effort required to farm. I like organic farming. Because organic food are more delicious and more healthy. Step V Wr
7、iting an argumentative essay giving your opinion on chemical or organic farming. Task 1 Complete the outline below. Topic sentence: In my opinion, _farming is preferable to _farming because _ Point1_ (Detail) _ Point2_ (Detail) _ Point3_ (Detail) _ Conclusion: _ Task 2 Use your outline to write a sh
8、ort essay giving your opinion on the topic, paying attention to using right transitional words. Task 3 Exchange posters with another pair. Use this checklist to give them helpful feedback. Does the writer do a good job of expressing his/her opinion? Does each paragraph have one main idea? Does each
9、paragraph have at one detail to support its main idea? Does the writer sequence the points in logical order? Does the writer do gcod job persuading you to accept his/her opinion? Task 4 Polish your drafts and share with your partners. 1.Put up the poster in your classroom or in a public place. 2.Appreciate your classmates good works and try to learn from them.
