高中英语 Unit 2 Woking the land usinglanguage教学案 新人教版必修4

1、山东省泰安市肥城市第三中学高中英语 Unit 2 Woking the land usinglanguage教学案 新人教版必修4教学内容Learning aims: 知识与能力：to master some sentence patterns of the text and know the differences between chemical farming and organic farming过程与方法：Further understand the passage 情感态度价值观：to enjoy the pleasure of study Learning key points:

2、 to know something about chemical farming and organic farmingLearning difficult points: to know something about chemical farming and organic farming【学案使用说明】1）熟读单词，为课文阅读做好准备。2）25分钟阅读课文，了解大意并完成练习题（自主学习及合作探究的题目）学习指导即时感 悟【课前预习】 Task1.1)冲洗掉 2）集中（注意力、精力）于 3）每隔几年 4）对造成伤害 5）逐步增强，建立 6）导致;造成(后果);通往 7）另外，而且 8）

3、转向 9）使免受影响、伤害等 10）减少疾病 11）化肥 12）阻止土壤流失 13）增加产量 14）富含营养 15）进入农作物内部 16)有用的细菌和害虫 17）有机农作物 18）避免做某事 Task2：1.regret（vt./n.遗憾.惋惜 （adj. 后悔的.遗憾 （adv. 后悔地）2. chemical（adj.化学的n.化学药品） （n.化学家、药剂师） （n.化学）3. production（n.生产、制造 （v.生产、制造 （n.产品、产物）4.nutrition（n.营养）- （adj.有营养的）5.summary（n.总结、摘要） （vt.总结、概括）6. discover

4、y(n.发现、发觉)- （vt. 发现）【自主 合作 探究】Task1 : （一）Match the main idea of each paragraph.para1: Several problems caused by using chemical fertilizers.para2: Some methods to keep the soil fertile.para3: A new discovery of scientists. para4: The advantages of using organic farming.（二）Answer the following questi

5、ons:1. Why are chemical fertilizers so popular in farming today? _2. Read paragraph 2 and find out the problems caused by using chemical fertilizers._3. Read paragraph 3-4 and answer: What are the advantages of organic farming?_Task21. focus vt.&vi. 集中(注意力)；聚焦 n. c,u 焦点；中心点focus on集中于 1). Focus your

6、 camera. 把照相机的焦距调准。2).Her beauty makes her the focus of attention. _(短语)_集中(注意力/心思/精力)于 3). All eyes _ _ (集中于) her.2. build up 逐渐建立；逐渐增强体质；积累；开发1). You need more protein to build you up. 你需要增加蛋白质以增强体质。2). He is now trying to _他正在努力逐步赢得好的声誉。【当堂达标】In the past, farmers welcomed _ fertilizers to stop cr

7、op disease and increase_. However,Recently, scientists have been finding that many _can be caused by them. First, they damage the land by killing the helpful _ and pests. These chemicals get inside the crops and cannot just be _ _, which _ _ in peoples bodies over time and can _ _ cancer or other il

8、lnesses. With these _, people are beginning to turn to _ farming, Which focus on keeping their soil rich and free of diseases and also _ the soil, water and crops_ _ chemicals. Organic farmers also use many other methods to keep the soil _. These many different organic farming methods have the same

9、goal: to grow good food and avoid _ the environment or peoples health.【总结提升】1. The new model will go into p_ next year.2. Because of his poor n_, he has grown weaker and weaker. 3. Those countries are rich in _ (矿物的) resources. 4. New scientific d_ are being made every day. 5. The group produces a m

10、onthly _ (摘要) of their research.6. We must_ our expenses to 300 yuan a month. 【拓展延伸】 做优化P32答案：Task11wash off 2.focus on 3.every few years 4.cause damage to 5.build up 6.lead to7.in addition 8.turn to 9.keepfree from 10.reduce disease 11.chemical fertilizers 12.prevent wind or water from carrying awa

11、y the soil 13.increase production 14.be full of much nutrition 15.get inside the crops 16.helpful bacteria and pests 17.organic farming 18.avoid doingTask21. regretful regretfully 2.chemist chemistry 3.produce product 4.nutritious5.summarize 6.discover自主 合作 探究Ipara1 2Many farmers welcomed them as a

12、great way to stop crop disease and increase productionThere are three problems. First, they can damage as well as . They also stay in the and . In addition, grow too fast to The farmers focus on keeping their soil rich and free of disease and keeping the air , soil, water and crops free from chemicals.II她的美丽使她成为了焦点。focus ones attention on focused onbuild up good reputation当堂达标Chemical、