资源简介

(共22张PPT)
Reading for Writing P55-57
Unit 5 Working the Land
新人教选择性必修Book 1
In this class, you will be able to:
· work out the content, structure and language features of the text;
· write your opinion in an essay about chemical farming or organic farming.
Learning objectives
A farmer is spraying chemicals that protect crops from being damaged by insects or diseases.
Lead-in
What is the farmer doing
A farmer is spraying / spre / chemicals that help crops grow successfully.
Lead-in
Is there any other alternatives of chemical farming
Pre-reading
What do you think will be included in the text
Versus: used to show that two teams or sides are against each other（表示两队或双方对阵）对，诉，对抗
While-reading
Listen and check your prediction
1. What’s chemical farming
2. What’s organic farming
Para.1
Chemical farming is farming using chemical pesticides and artificial fertilizers.
Para.3
While-reading
Skim and match the questions with each para.
A. Why are man-made chemicals still used in farming
B. What are the problems with chemical farming
C. What is organic farming
D. What are the organic methods for producing rich soil
Para 1-2
Para 3
Para 4
Para 5
What’s the text type
A.narration(记叙)
B.exposition(说明)
C.argumentation(议论)
While-reading
Read for the structure
The _______ and _________ of chemical farming.
benefits
problems
A __________: Organic farming.
A __________: Organic farming and
solution
how it keep the soil rich
solution
Conclusion
1.Why did many farmers welcome the introduction of chemical farming
2. What concerns many people about the use of pesticides
3. What is one problem with the use of chemical fertilisers
4. How is organic farming different from chemical farming
5. Why do organic farmers change the kind of crop grown in a field every year
6. What is the goal of using organic farming methods Do you think it can be reached Why or why not
While-reading
Read and and answer the questions
1. Why did many farmers welcome the introduction of chemical farming
Many farmers welcomed them as a great way to fight crop
diseases and increase production.
2. What concerns many people about the use of pesticides
Their long-term use can sometimes harm both the land
and people’s health.
Para.1
While-reading
Read and and answer the questions
3. What is one problem with the use of chemical fertilisers
Crops grown with them usually grow too fast to be rich
in nutrition.
Para.2
While-reading
Read and and answer the questions
some pesticides like DDT have been prohibited in most countries because of the damage they cause to people and the environment.
Para. Main idea Details
1&2 Problems with Chemical farming Topic sentence: Many farmers welcomed chemical farming as a great way to and .
However,________________________________________.
For example, Pesticides can by killing bacteria and insects.
In addition, .
This affects not only but also _____.
In fact, .
As for chemical fertilizers,
Crops are lacking in________________or have .
increase production
fight crop disease
what some scientists have found is that their long-term use can sometimes harm both the land and people’s health.
damage the land
these chemicals can stay in the soil and underground water sources for a long time.
the crops
animals and humans
nutrition/essential minerals
less flavour
Benefit
Problem
Solution

switch to organic farming
While-reading
Read again and finish the table
What words and expression in Paragraph 2 show the transitions between ideas
4. How is organic farming different from chemical farming
Organic farming is simply farming without using any chemicals. Organic farmers focus on keeping their soil rich and free of diseases through natural means.
Para.3
While-reading
Read and and answer the questions
5. Why do organic farmers change the kind of crop grown in a field every year
Different crops are grown because they put important
minerals back into the ground, making it ready for the
next batch of crops.
Para.4
While-reading
Read and and answer the questions
Para.4
6. What is the goal of using organic farming methods
Do you think it can be reached Why or why not
The goal of using different organic farming methods is to
grow good food while avoiding damage to the environment
or to people’s health.
While-reading
Read and and answer the questions
Para. Main idea Details
3&4 Organic methods for producing rich soil Topic sentence: Organic farming focuses on keeping the soil rich and free of disease through natural means.
For example, Organic farmers use ____________ from animals as fertiliser.
This makes the soil in their fields _______ in minerals.
It also keeps the air, soil, water and crops free of __________.
Organic farmers also use many other methods to produce rich soil.
They often _________________ grown in each field every year.
For instance, they may grow in a filed one year, and then grow there the next.
Why different crops are grown is because they put important __________ back into the ground, making it ready for the next batch of crops.
Organic farmers also plant diverse crops that use different _________ of soil to help keep it rich.
For example, .
natural waste
richer
chemicals
change the crops
corn or wheat
beans
minerals
depths
peanut grow on the ground’s surface, but many other vegetables put down deep roots
Benefit
While-reading
Read again and finish the table
Why different crops are grown is because they put important minerals back into the ground, making it ready for the next batch of crops.
句意：种植不同的作物是因为它们把重要的矿物质放回地下，使它为下一批作物再次做好准备。
句子结构分析
why引导的主语从句
because引导的表语从句
现在分词作状语
系动词
Farming Advantages Disadvantages
Chemical farming ......
......
Organic farming
Fight crop disease
Increase production
Lower cost
Crops look beautiful outside
Harm the land
Harm people’s health
Harm the environment
Crops are less in nutrition
Good food
Avoiding damage to the environment or to people’s health
Cannot meet the demand for food
More efforts and higher cost
Smelly gases
Post-reading
Discuss the advantages and disadvantages





however, but, on the contrary, instead, on one hand … on the other hand
for example, for instance, in fact, such as, take … for example
both…and…, not only…but also, in addition, and, also, as well, what’s more, besides, furthermore, moreover, what’s worse
why…is because…, therefore, for this reason, thus, consequently, as a ressult
as for, as an alternative
contrast
illustrate
add
cause and effect
introduce a new topic
Post-reading
Read for language features
Topic sentence: In my opinion, ___ __ farming is preferable to ____ __ _ farming because _____
Point 1: _________________________________________
Point 2: _________________________________________
Point 3: _________________________________________ Conclusion:______________________________________
organic
chemical
there are many obvious advantages.
Organic farmers try to avoid using chemical pesticides and fertilizers to help crops grow.
Organic farmers focus on keeping their soil rich and free of disease through natural means.
Organic food is not only safe and healthy but also more nutritious and tastes better.
All in all, I’ m in favour of organic farming.
make a conclusion:
In summary,In a word,…All in all,…To sum up,…
Post-reading
Retell your opinions
express your opinions:
In my eyes…
I’m opposed to…
I’d prefer… because…
From my point of view,…
What I firmly believe in is that…
Thank you for listening!

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