浙江省衢州市高中英语《Unit2 working the land2》教案 新人教版必修4.doc

unit 2 working the land教材分析（analysis of teaching material）: this passage is a about organic farming. nowadays, the chemical fertilizers are popular among farming. it damages the land, is bad for environment and peoples health. some farmers and customers prefer the organic farming. students can learn something about it from this passage.学情分析（analysis of the students）this passage is little difficult for our students. there are some difficult sentences for them. teachers can help students to read them and try to translate them. meanwhile, our students can learn something new about farming. chemical fertilizers cause many problems, so organic farming are popular among farming. 教学目标(teaching aims)知识目标(knowledge aims)words: mineral; reduce; organic; level; whatever; bacteria; refer to; year after yearsentences: 1） many farmers welcomed them as a great way to stop crop disease and increase production.2) first, they damage the land by killing the helpful bacteria and pests as well as the harmful ones.3) these many different organic farming methods have the same goal: to grow good food and avoid damaging the environment or peoples health.能力目标(ability aims):enable students to master the main idea of the text and know the ways of organizing articles.情感目标（emotional aims）: help students learn how to enlarge the words and know the ways of the same topic.教学重点和难点（teaching important points and difficult points）#teaching important points: words and expressions, main idea and some difficult sentences#teaching difficult points: how to grasp the main idea of the passage; how to grasp the words and phrases and be able to use them of the same topic.教学过程(teaching procedures)step 1 pre-reading q :1) how do you know about the organic farming? can you say something about it?2) as known to all, chemical fertilizers can help the crops grow strong and big, do you think it is good for our health? and why?step 2 reading task 1 questions about the passage.1) whats the organic farming?2) what is the advantage of using natural fertilizers?3) what is the disadvantage of using chemical fertilizers?4) whats the main idea of paragraph 3?5) why do farmers grow their crops in such ways?task 2 structure of the text organic farming i crops growing with natural fertilizers ii farmers prefer natural waste from animals natural fertilizer chemical fertilizer 1 make richer and 1 leaving is not good more fertili2 reduce and help strong 2 grow year after year 3 the fertilizers kill from chemicals iii farmers change crops every twe or three years. to make sure what is left this is the structure of the text, read it and retell the text according to it. task 3 exercises on page 14because some of the exercises have been involved in step ii, teachers can leave this part to students.for exercise 3, here is a simple:organic farming means crops growing with natural fertilizers instead of chemical ones. yhe natural fertilizer which is natural waste from animals does good to soil. it makes the soil richer in minerals while chemical fertilizers damage the soil, leaving chemicals fertilizers in the ground for a long time and killing both helpful and harmful bacteria and pests. organic farmers keep the soil rich and healthy by changing plants every two or three years, planting different crops in different layers and planting grass between crops to prevent wind or water from carrying away the soil.板书设计 organic farming i crops growing with natural fertilizers ii farmers prefer natural waste from animals natural fertilizer chemical fertilizer 1 make richer and 1 leaving is not good more fertili2 reduce and help strong 2 grow year after year 3 the fertilizers kill from chemicals iii farmers change crops every twe or three years. to make sure what is left 1.2. retell the passage: using chemical fertilizers is popular because it can stop crop disease and increase _1_, but long-term use of these fertilizers can cause damage to the land and even to peoples health. organic farming is to grow crops with natural but not _2_ fertilizers. organic farmers _3_ keeping their soil rich and _4_ disease. they prefer using natural waste from animals as fertilizers. they think this makes the soil in their fields _5_- minerals and so more _6_. organic farmers also use many other methods to keep the soil fertile. they often change the kind of crop in each field _7_, or plant crops to use different _8_ of soil, or plant grass between cops to prevent wind or water from _9_ the soil. however, these methods have the same goal: to grow good food and avoid damaging the _10_ or peoples health.问题研讨(problem study):课堂提问:1) whats the organic farming?2) what is the advantage of using natural fertilizers?3) what is the disadvantage of using chemical fertilizers?4) whats the main idea of paragraph 3?5) why do farmers grow their crops in such ways?练习: exercises on page 35 of the exercise book:chemical farming advantagesstopping crop disease and increase production disadvantagesdamaging the land: killing the helpful bacteria and pestsdamaging peoples health: many chemical in the food supply can lead to cancer or other illnessesfood grows too fast to be full of much nutritionorganic farming goal to grow good food and avoid damaging the environment or peoples healthmethodsusing natural waste from animals as fertilizer.changing the kind of crop in each field every few years.using different levels of soil to plant crops.planting grass between crops作业part 1 (a level)单词拼写1. after a long s_, he gained control of the business.2. our foreign trade has e_ greatly in recent years.3. e_ your child with some special skills is necessary.4. the twins are so alike that i always c_ them with each other.5. he died of h_ because he had not eaten for days.6. as is known to all, coal and iron are _（矿物）.7. if you keep staying in the sun for a long time, youll get _(晒黑的).8. every year, we will _(出口) a lot of rice to other countries.9. in the past three _(十年), great changes have taken place in our hometown.10. it is suggested that the only way to do that is to _(减少) expenses.keys: 1 struggle 2 expanded 3 equipping 4 confuse 5 hunger 6 minerals 7 sunburnt 8 export 9 decades 10 reduce part 2 (b level) 选词填空ridof; be satisfied with; focus on; thanks to; would rather; make comments on; be rich in 1. _ the doctors timely help, the boy was saved.2. the chairman told us that the meeting would _ how to deal with the pollution caused by the factories.3. you have given the correct answer. i _it.4. he read the contents himself and _ it in time.5. last night they _the dormitory _mice, which made much noise at night.6. as we know, vegetables _vitamins.7. i dont hope to leave so soon; i _ stay home a day lpnger.keys: 1 thanks to 2 focus on 3 am satisfied with 4 made comments on 5 rid of 6 are rich in 7 would rather part 3 (c level) 根据课文内容填空 using chemical fertilizers is popular because it can stop crop disease and increase _1_, but long-term use of these fertilizers can cause damage to the land and even