Unit 19 Modern agriculture 第一課時教案

　　t: “ why do you know farmers should do so? ”
　　ss: “ they must protect forests. / in order to protect forests. ”
　　t: “ have you even had experience of sandstorm in beijing ? how about sandstorm? ”
　　ss: “yes , it is so terrible weather.”
　　t: “ what cause sandstorm? ”
　　ss: “ many forests are destroyed, the environmental problems is serious.”
　　t: “how can farmers make the land fertile?”
　　ss: to use chemical fertilizers to improve the soil.
　　…
　　2. t introduce: “ we will hear a short text. the listening text is about the history of farming, some of its problems and some solutions or alternatives to these problems.”
　　3. let ss listen to the tape the first time, without taking notes. then, ask them to look at exercise 1. make sure they understand all the words. then, ask the students to listen again, and tick the items the listening text is about.
　　4. let ss listen to the tape again and ask them to finish exercise 2.
　　5. get ss listen to the tape for third time and fill in the blank in the exercise 3.
　　6. if time permitted, teacher can get ss to listen another listening text and do some exercises.
　　7. if time permitted, teacher get ss to finish the exercises in workbook/ listening (page 107)
　　step iii. speaking
　　1. group work: get ss to work in groups and divide ss into groups of five. each group , each topic. let them act as each role. and discuss why we should grow wheat/ sugarcane/ wheat/ trees or raise pigs.
　　2. let ss make sentences using the following expressions:
　　in my opinion you should…
　　if i were you…
　　as far as i can see the best thing would be to …
　　wouldn’t it be better if …?
　　i think he is right…
　　we have to make a choice…
　　we can’t do both, so…
　　the other idea sounds better to me… 
　　3. talking (workbook, page 108)
　�、� let ss work in small groups of five and assign any of the three topic to the groups
　�、� give ss time to read the three descriptions and ask questions about them.
　�、� ask ss to discuss these issues in a way that they develop and give their own opinion about the issues at hand.
　　step iv. summary
　　teacher explain some language points in the book
　　ⅰ.what do you think cause these changes ?
　　① do you think 是插入語，經常位于疑問詞（組）后，如
　　where do you think the old lady is?
　　有時也可以放在句尾。例如：
　　what is it, do you think?
　�、� cause v. = be the cause of (sth); make happen 造成（某事物）；使發生
　　如： smoking can cause lung cancer. 吸煙可導致肺癌。