Unit 19 Modern agriculture 第一课时教案

unit 19 modern agriculture 第一课时教案
i. teaching aims:
　　talk about modern agriculture and its effects on people’s life
　　learn how to give somebody advice and make decisions.
　　learn to read statistical graphs
　　similar dialogue presentation with new words and expressions used within
　　ii. teaching aids: tape recorder, slides
　　step i warming up
　　1. group work: get ss to work in pairs, and make a list of food which his grandparents and his parents and himself like to eat. then ss find out the difficulty among them.
name breakfast  snacks  lunch  dinner
grandma/ grandpa           
mother/ father           
yourself           
　　2. let ss look at the chart in the book, and ask them some questions:
　　t: “ what the graph is about, look at the words above or below the graph? ”
　　ss: “ growth of major products 1991-95 compared with 1986-90 percentages ”
　　t: “ what kind of food were shown on the chart? ”
　　ss: “ there are grain, cotton, oil, sugar, meat, fish, fruit. ”
　　t: “ what is shown on the y-axis?”
　　ss: “ the percentage in sb ”
　　3. let ss answer the following questions in the book. if possible, students can discus three questions in groups.
　　question 1: how are people’s eating habits changing over the years? why do you think this happens?
　　(earn more money; learn about healthy food;  eat more nutritious fruit juices; eat more fish and meat, etc.)
　　question 2: how has agricultural produce changed during these years? what do you think caused these changes?
　　(various farming products; make more money; new and advanced farming technique,etc. )
　　question 3: what effects do you think the changes in eating habits will have on agriculture or nature?
　　(people need more meat and fruits; farmers need more farmland to grow different crops and produce different foods; farmers need to raise more poultry(家禽), etc. )
　　4. teacher sum up in a few words
　　t: “in words, changes in agricultural produce shows that our living habit and eating habit has improved. farmers have a different and happy life because they can grow different crop to meet people’s need.”
　　step ii  listening
　　1. lead- in
　　t: “ i often find the expression ‘return grain plots to forestry’ in newspapers, do you know what does it mean in chinese? ” (teacher write the expression on the blackboard)
　　ss: “ in chinese, ‘退耕还林’.”
　　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 pide 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)
　　① let ss work in small groups of five and assign any of the three topic to the groups
　　② give ss time to read the three descriptions and ask questions about them.
　　③ 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 是插入语，经常位于疑问词（组）后，如
　　where do you think the old lady is?
　　有时也可以放在句尾。例如：
　　what is it, do you think?
　　② cause v. = be the cause of (sth); make happen 造成（某事物）；使发生
　　如： smoking can cause lung cancer. 吸烟可导致肺癌。
　　she’s always causing trouble for people. 她总是给人添麻烦。
　　ⅱ. make a decision“做决定，决定”
　　如：i make a decision to learn english hard.
        because of bad weather, they make a decision to put off the meeting.
　　ⅲ. you want to use the land in the best way possible and do the best for everybody in the village 为了村里的每一个人，你想尽自己最大的努力，以最好的方法来使用这块地。
　　in the best way possible 尽能最好的方法。possible表示“尽可能最……”
　　do the best表示“尽力”。如：
　　she do the best to help the old lady. 她尽力地帮助这个老妇人。
　　step v exercise
　　1. finish the exercises in workbook, page108.
　　2. let ss finish the follow exercises. （show slides）
　　1.he said he was going to ____ a lot of pigs on his far. (b)
　　a. rise  b. keep c. grow   d. support
　　2. my father studies ______ in his spare time. （c）
　　a. farm  b. farmer   c. farming   d. to farm
　　3. he is ______ interested in english. he often works at it until ______ into the night. (a)
　　a．deeply; deep  b．deep; deeply  c．deep; deep d．deeply; deeply
　　4. they ____ chickens, cattle and crops as well on the farm. (a)
　　a. raise  b. feed  c. keep  d. bring up
　　5. my brother stayed at home studying english ____ going to the cinema. (b)
　　a. instead   b. instead of   c. without    d. didn’t
　　6. the accident was my fault, so i had to pay for the damage ____ the other car. (c)
　　a. of   b. at    c. to    d. on
　　7. the old man is still suffering from pain. it seems that the medicine has _____ him. (b)
　　a. no effect to  　　b. is used for 
　　c. some effect in 　 d. a good effect on
　　8. _____ should a man have courage, ______ he should have wisdom and knowledge.  (d)
　　a. neither…nor b. both…and  c. either…or d. not only …but also
　　9. he talked about his wonderful ____ in africa, but he said he didn’t have _____ in dealing with some problems he met there.   (a)
　　a. experiences…much experience
　　b. experience…many experiences
　　c. experiences… many experiences
　　d. experience…much more experience
　　10. a library with five thousand books _____ to the nation as a gift.  (a)
　　a. is offered  b. have offered  c. are offered  d. has offered