Learning about Language课堂实录及点评

必修四 好的开始是成功的一半A good beginning is half of success!

Unit 2 Working the land --Chemical or Organic Farming?

Section 3 Using language 【学习目标】

1.通过对文章的认真阅读，理解chemical farming 和organic farming的区别。

2.通过自主学习、合作探究，掌握课文中重点短语、理解长难句型。

【预习案】从课文中找出以下单词和短语。

1)

化肥2)

细菌3).

adj.化学的4

n.生产

5）

n.发现6）

adj.工业的7）.

n. 营养，食物

8）

v减少，缩减9）

.n. 总结，摘要10）

.n. 评论，议论

11）

对…造成损害12).

洗掉某物

13).

导致;造成(后果);通往14).

逐渐增强,堆积，建立15).

另外(还有)16).

使…免受(影响); 使…不含(有害物) 17).

集中(注意力、精力)于18).

每隔几年

19).

避免做…20

幸亏，由于21.

对……感到满意

22

对……感到困惑23

后悔做了某事

24.

减少到……25.

对……做出评论

26

(Vt.使迷惑)

（adj.令人迷惑的）

（adj.迷惑的；为难的）

27.

（vt./n. 遗憾、惋惜）

（adj. 后悔的；遗憾的）

（adv. 后悔地；遗憾地）28.

(n.发现、发觉)-

（vt. 发现）

29.

（adj.化学的n.化学药品）

（n.化学家、药剂师）

（n.化学）

30.

（n.生产、制造）

（v.生产、制造）-

（n.产品、产物）

31

n.营养

adj.有营养的32.

n.总结、摘要

（vt.总结、概括）

【探究案】

Step 1: Warming up 1. Have you ever been to the countryside? 2. Do you know how to work on a farm? 3. If you are a landowner, you want to grow some kinds of crops, what will you do? Step II Reading Task 1 Scanning 1. What is organic farming?

2. What is chemical farming?

3. What is the goal of using organic farming methods?

Task 2 Skimming Find out the main idea of these four paragraphs. Match the lines. P.1

Other methods to keep the soil fertile

P.2

Farmers and customers turn to organic farming.

P.3

Problems caused by chemical fertilizers

P.4

Long-term use of chemical fertilizers can cause damage to the land and people’s health.

Main idea of the passage.

必修四 好的开始是成功的一半A good beginning is half of success!

_________________

can cause many problems, so _

_______________is becoming more popular. Task 3 Careful reading 1. Read the second paragraph and answer the following questions What problems can be caused by using chemical fertilizers? In other words,what’s the

disadvantages of chemical fertilizers?

2. Read the third paragraph and write down the advantages of organic farming.

Task 4 Summary Fill in the blanks according to the passage. In recent days, scientists have discovered that using________

fertilizers for a long time can hurt the land and also people's _______. There are several __________ caused by chemical fertilizers. They hurt the health of the land,_____ in the water for a long time and get into people's ________ through their food. ________ farming is becoming more popular with some farmers and many _________ after these discoveries came out. Organic farming does not use any chemicals. There are many organic farming_________ for making the land healthy and productive. All of these methods try to produce good food and to keep the _____________and people ________.