(共38张PPT)
Chemical
versus
organic
farming
Period
5
Unit
5
Working
the
Land
选择性必修一
人教版（2019）
He
is
spraying
pesticide
What
are
they
doing？
He
is
using
organic
fertilizer
Lead-in
Lead-in
He
is
fertilizing
the
soil
What
is
chemical
farming?
Lead-in
Lead-in
Chemical
farming
is
farming
using
chemical
pesticides
and
artificial
fertilizers
What
is
organic
farming?
Lead-in
Lead-in
Organic
farming
is
not
pesticide,
fertilizer,
and
other
synthetic
growth
agents
of
production,
but
use
manure
for
fertilizer
and
other
organic
fertilizers.
Reading
3.
widespread
adj.
Chemical
pesticides
and
artificial
fertilisers
have
been
in
widespread
use
in
farming
since
the
middle
of
the
20th
century.
When
they
were
first
introduced,
many
farmers
welcomed
them
as
a
great
way
to
fight
crop
disease
and
increase
production.
Over
time,
however,
what
some
scientists
have
found
is
that
their
long-term
use
can
sometimes
harm
both
the
land
and
people’s
health.
para.1
chemical
pesticides
2.
artificial
fertilisers
Question
Time
Read
the
text
and
answer
the
following
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.
Paragraph1
细节理解
Question
Time
Read
the
text
and
answer
the
following
questions.
2.
What
concerns
many
people
about
the
use
of
pesticides?
Their
long-term
use
can
sometimes
harm
both
the
land
and
people’s
health.
Paragraph1
细节理解
Reading
6.
in
turn
For
example,
pesticides
can
damage
the
land
by
killing
not
only
harmful
bacteria
and
insects,
but
also
helpful
ones.
In
addition,
these
chemicals
can
stay
in
the
soil
and
underground
water
sources
for
a
long
time.
This
affects
the
crops
grown
on
the
land
and,
in
turn,
the
animals
and
humans
who
digest
them.
Many
people
worry
that
these
chemicals
may
make
them
ill
and
even
cause
cancer.
para.2
4.
bacteria
5.
digest
Reading
In
fact,
some
pesticides
like
DDT
have
been
prohibited
in
most
countries
because
of
the
damage
they
cause
to
people
and
the
environment.
As
for
chemical
fertilisers,
crops
grown
with
them
usually
grow
too
fast
to
be
rich
in
nutrition.
They
may
look
beautiful
on
the
outside,
but
inside
there
is
usually
more
water
than
essential
minerals,
and
they
often
have
less
flavour
as
well.
8.
nutrition
n.
9.
essential
adj.
para.2
prohibit
v.
mineral
n.
Reading
As
an
alternative,
some
farmers
have
switched
to
organic
farming,
and
many
customers
have
turned
to
organic
food
when
they
shop
at
the
local
grocery.
Organic
farming
is
simply
farming
without
using
any
chemicals.
Organic
farmers
on
keeping
their
soil
rich
and
free
of
disease
through
natural
means.
For
example,
many
organic
farmers
use
natural
waste
from
animals
as
fertiliser.
This
makes
the
soil
in
their
fields
richer
in
minerals.
It
also
keeps
the
air,
soil,
water,
and
crops
free
of
chemicals.
para.3
vocabulary
alternative
n/adj.
12.
grocery
13.
free
of
Question
Time
Read
the
text
and
answer
the
following
questions.
3.
What
is
one
problem
with
the
use
of
chemical
fertilizers?
Crops
grown
with
them
usually
grow
too
fast
to
be
rich
in
nutrition.
Paragraph2
细节理解
4.
How
is
organic
farming
different
from
chemical
farming?
Paragraph3
细节理解
Organic
farming
is
simply
farming
without
using
any
chemicals.
Organic
farmers
focus
on
keeping
their
soil
rich
and
free
of
disease
through
natural
means.
Reading
Organic
farmers
also
use
many
other
methods
to
produce
rich
soil.
They
often
change
the
kind
of
crop
grown
in
each
field
every
year.
For
instance,
they
may
grow
corn
or
wheat
in
a
field
one
year,
and
then
grow
beans
there
the
next.
Why
different
crops
are
grown
is
because
they
put
important
minerals
back
into
the
ground,
making
it
ready
for
the
next
batch
of
crops.
para.
4
vocabulary
14.
instance
n.
for
instance
15.
……,
making
it
ready
for
the
next
batch
of
crops.
V-ing
做结果状语（自然而然的结果）
Reading
Organic
farmers
also
plant
diverse
crops
that
use
different
depths
of
soil
to
help
keep
it
rich.
For
example
peanuts
grow
on
the
ground’s
surface,
but
many
other
vegetables
put
down
deep
roots.
The
goal
of
using
different
organic
farming
methods
is
to
grow
good
food
while
avoiding
damage
to
the
environment
or
to
people’s
health.
16.
depth
n.
17.
root
n.
put
down
deep
roots
para.
4
Question
Time
Read
the
text
and
answer
the
following
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.
Paragraph4
推理判断
Question
Time
Read
the
text
and
answer
the
following
questions.
6.
What
is
the
goal
of
using
organic
farming
methods?
Do
you
think
it
can
be
reached?
Why
or
why
not?
1）The
goal
of
using
organic
farming
methods
is
to
grow
good
food
while
avoiding
damage
to
the
environment
or
to
people’s
health.
2）
Yes,
I
think
this
goal
can
be
reached.
People’s
awareness
of
eating
organic
foods
is
increasing.
And
farmers
worked
for
centuries
without
using
any
kinds
of
chemicals
and
without
harming
the
environment,
and
the
food
they
produced
was
just
fine.
Paragraph4
细节理解+观点态度
Reading
Some
people
would
prefer
to
stop
the
use
of
man-made
chemicals
in
agriculture
entirely.
What
keeps
them
from
doing
so
is
the
fact
that
chemical
farming
serves
the
high
demand
for
food
around
the
world.
Organic
farming
is
nowhere
near
able
to
meet
that
need.
Therefore,
there
is
still
a
long
way
to
find
a
suitable
solution
that
puts
sufficient
food
on
the
dinner
table
while
keeping
people
and
the
environment
as
healthy
as
possible.
vocabulary
18.
entirely
adv.
19.
What
keeps
them
from
doing
so
is
the
fact
that
chemical
farming
serves
the
high
demand
for
food
around
the
world.
what引导主语从句，在从句中做主语；that引导同位语从句，是the
fact的同位语。
para.
5
Question
Time
Read
the
text
and
answer
the
following
questions.
7.
Why
could
some
people
not
choose
but
use
man-made
chemicals
in
agriculture？
Because
chemical
farming
still
serves
the
high
demand
for
food
around
the
world
and
organic
farming
is
nowhere
near
able
to
meet
the
need.
Paragraph5
细节理解
Reading
Read
the
passage
carefully
and
complete
the
sentences
in
the
table.
Kind
Detail
Chemical
farming
Advantages:
a
great
way
to
Disadvantages
:
kill
affect
Organic
farming
Advantages:
The
soil
is
rich
in
Keep
free
of
chemicals
Avoid
damage
to
Disadvantages
:
The
writer’s
view
fight
crops
disease
and
increase
production.
helpful
bacteria
and
insects
crops,
animals
and
people
minerals
the
air
,
soil
,
water
,
and
crops
the
environment
or
to
people’s
health
nowhere
near
able
to
meet
the
need.
There
is
still
a
long
way
to
find
a
suitable
solution
Group
show
Match
the
main
ideas
(A-D)
below
with
the
paragraphs.
Paragraph
Main
idea
1-2
3
4
5
A
What
organic
farming
is
B
Why
man-made
chemicals
are
still
used
in
farming
C
Organic
methods
for
producing
rich
soil
D
The
problems
with
chemical
farming
D
A
C
B
Group
show
Complete
the
sentences
in
the
table.
Paragraph
Detail
1-2
Pesticides
can
kill
helpful
.
Some
pesticides
have
been
because
of
the
.
Crops
grown
with
chemical
fertilisers
usually
to
be
full
of
.
3
Many
organic
farmers
use
as
fertiliser.
bacteria
and
insects
prohibited
damage
they
cause
natural
waste
from
animals
grow
too
fast
nutrition
Group
show
Complete
the
sentences
in
the
table.
Paragraph
Detail
4
They
often
grown
in
each
field
.
They
also
plant
crops
that
use
of
the
soil
to
help
keep
it
rich.
5
Organic
farming
is
nowhere
near
able
to
meet
the
high
.
change
the
kind
of
crop
every
year
different
depths
demand
for
food
around
the
world
Study
adj.完全必要的;极其重要的
Water
is
essential
to
life,
so
we
should
save
water.
对……很重要
be
essential
to/for
It
is
essential
that...(should)
do...
做……是完全必要的
It
is
essential
for
sb
to
do...
对某人来说做……是完全必要的
Study
1）对于这份工作，耐心是非常重要的。
Patience
is
essential
for
this
job.
It
is
essential
that
effective
measures
be
taken
to
protect
our
environment.
2）有必要采取有效的措施来保障我们的环境。
When
we
learn
a
language
,
it
is
essential
for
us
to
learn
vocabulary.?
3）当我们学某种语言时，我们有必要学词汇。
Study
n．可供选择的事物
adj.可供替代的；非传统的
He
has
the
alternative
of
going
to
college
or
working.
……的替代品
an
alternative
to
have
no
alternative
but
to
do
sth
别无选择只好做某事
have
the
alternative
of
doing
sth
有做某事的选择
Study
1）由于疫情封锁（
coronavirus
lockdown
），他除了居家别无选择。
Due
to
the
coronavirus
lockdown,
he
has
no
alternative
but
to
stay
at
home.
We
have
the
alternative
plans
of
having
a
picnic
or
climbing
a
hill.
2）我们在去野餐或者去爬山两个计划中只能选一样。
As
an
alternative,
some
farmers
have
switched
to
organic
farming.?
3）作为一种选择,一些农民已经转向有机农业。
Study
为什么要种植不同的作物,是因为他们把重要的矿物质放回地里,让它再
次为下一批作物做准备。
Why
different
crops
are
grown
is
because
they
put
important
minerals
back
into
the
ground
,
making
it
ready
again
for
the
next
batch
of
crops.
动词-ing形式短语做结果状语表示自然而然的结果，常用逗号与主句隔开,
有时在其前加副词thus;动词不定式做结果状语往往表示出乎意料的结果
或不好的结果,其前常加only。
动词-ing形式短语做结果状语。
Study
1）他跑到火车站,却发现火车已开走了。
He
ran
to
the
station
,
only
to
find
the
train
had
left.?
The
car
was
caught
in
a
traffic
jam
,
thus
causing
the
delay.
2）这辆车遇到了交通堵塞,结果晚点了。
The
hospital
has
recently
obtained
new
medical
equipment,
allowing
more
patients
to
be
treated.
?
3）近期这个医院购进了新的医疗设备，允许更多的病人被治疗。
Group
work
Discuss
the
advantages
and
disadvantages
of
chemical
farming
and
organic
farming.
And
tell
which
one
you
prefer
and
why.
Tips:
Chemical
farming
Advantages:
fight
crop
diseases,
increase
production
(serve
the
high
demand
for
food
around
the
world)
Disadvantages:
1)pesticide
can
harm
land
and
people’s
health,
kill
helpful
bacteria
and
insects
and
stay
for
a
long
time
and
affect
crops,
animals
and
people
2)chemical
fertilizer
are
not
rich
in
nutrition
and
have
less
flavor
Group
work
Discuss
the
advantages
and
disadvantages
of
chemical
farming
and
organic
farming.
And
tell
which
one
you
prefer
and
why.
Tips:
Organic
farming
Advantages:
keep
soil
rich
and
free
from
disease
through
natural
means
Details:
natural
waste
from
animals
as
fertilizer
change
the
kind
of
crop
in
each
field
every
year
plant
diverse
crops
using
different
depths
of
soil
Disadvantages:
unable
to
serve
the
high
demand
for
food
around
the
world
Group
work
Write
an
short
passage
to
show
whether
you
support
chemical
farming
or
organic
farming.
(Following
the
format
of
an
argumentative
essay.
Topic
sentence:
In
my
opinion,
farming
is
preferable
to
farming
because
.
Point
1:
.
(Detail)
.
Point
2:
.
(Detail)
.
Point
3:
.
(Detail)
.
Conclusion:
.
Group
work
Discuss
the
difference
between
traditional
agriculture
and
modern
agriculture.
And
tell
which
one
you
prefer
and
why.
Topic
The
difference
between
traditional
agriculture
and
modern
agriculture
Tense
The
simple
present
tense
Outline
P1
Your
opinion
P2
Compare
the
difference
P3
Conclusion
Group
work
Discuss
the
difference
between
traditional
agriculture
and
modern
agriculture.
And
tell
which
one
you
prefer
and
why.
Key
words
output
working
efficiency
fertilisers
pesticides
environment
Key
sentences
In
my
opinion,
is
preferable
to
.
most
farmers
grow
crops
with
the
help
of
modern
machines
instead
of
planting
crops
with
their
hands.
In
a
word
.
Highlights
What’s
more,
the
output
and
working
efficiency
are
also
improved
greatly,
which
contributes
a
lot
to
social-economic
development.
Group
show
Exchange
your
draft
with
a
partner.
Use
the
checklist
to
help
you
review
your
partner’s
draft.
Share
your
essay
with
the
rest
of
the
class.
Groups
Achievements
Group1
Group2
Group3
Group4
……
Group
show
In
my
opinion,
modern
agriculture
is
preferable
to
traditional
agriculture.
First
of
all,
nowadays
most
farmers
grow
crops
with
the
help
of
modern
machines
instead
of
planting
crops
with
their
hands.
As
a
result,
modern
farmers
no
longer
need
to
work
so
hard
as
before.
What’s
more,
the
output
and
working
efficiency
are
also
improved
greatly,
which
contributes
a
lot
to
social-economic
development.
Although
the
fertilisers
and
pesticides
used
in
modern
agriculture
have
destroyed
the
environment
badly,
experts
are
making
efforts
to
get
rid
of
them
and
paying
more
attention
to
the
plant
nutrition
and
protection.
In
a
word，I
am
in
favor
of
modern
agriculture.
One
possible
version：
Exercise
1.
Sun
and
water
are
essential
the
growth
of
crops.
2.It
is
essential
that
you
(learn)
Chinese
history.?
4.I
had
no
alternative
but
(accept)
the
offer.
3.By
1921,however,peanut
had
become
a
real
alternative
cotton.?
5.
The
cooling
wind
swept
through
out
bedroom
windows,
（make）
air
conditioning
unnecessary.
?
to/for
(should)
learn
to
to
accept
making
Summary
We've
learned
the
following
in
the
class：
Homework
Use
what
you
have
learned
to
write
an
introduction
chemical
farming
and
organic
farming.
And
tell
which
one
you
prefer
and
why.
（80-120词左右）
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新人教版（2019）英语选择性必修一
Unit5
Working
the
Land
Period5
Chemical
versus
organic
farming教学设计
课题
period5
Chemical
versus
organic
farming
单元
Unit5
学科
English
年级
Senior
Grade
2
教材分析
This
part
is
a
reading
passage
about
Chemical
versus
organic
farming.
Through
the
passage
students
can
know
chemical
farming
and
organic
farming，thus
inspiring
us
to
eat
healthy.
学习目标
与核心素养
Knowledge
objectives:
grasp
some
important
words,
phrases
and
expressions
in
this
parts.
And
learn
the
difference
between
chemical
farming
and
organic
farming.
Skill
objectives:
master
how
to
distinguish
two
things
and
grasp
the
structure
of
an
argumentative
essay,
especially
making
comparison.
Emotional
objectives:
learn
to
explore
Chemical
versus
organic
farming
and
improve
the
ability
to
distinguish
two
things..
重点
Help
students
to
introduce
organic
farming
using
the
related
words
and
expressions.
难点
Some
related
expressions
to
an
argumentative
essay.
教学过程
教学环节
教师活动
学生活动
设计意图
导入新课
Step1
lead-in
Question:what
are
they
doing？
He
is
spraying
pesticide
He
is
fertilizing
the
soil
He
is
using
organic
fertilizer
What
is
chemical
farming?
Chemical
farming
is
farming
using
chemical
pesticides
and
artificial
fertilizers
What
is
organic
farming?
Organic
farming
is
not
pesticide,
fertilizer,
and
other
synthetic
growth
agents
of
production,
but
use
manure
for
fertilizer
and
other
organic
fertilizers.
Discuss
the
pictures
in
groups
and
answer
the
following
questions
What
are
they
doing？
The
method
can
arouse
students’
interesting,
and
they
can
come
into
the
class
actively.
Introduce
the
topic
Chemical
versus
organic
farming
讲授新课
Step2
Reading
Paragraph1
1.chemical
pesticides
2.
artificial
fertilisers
3.
widespread
adj.
Paragraph2
4.
bacteria
n.
5.
in
turn
6.
digest
vt.&vi.
7.
prohibit
v.
8.
nutrition
n.
9.
essential
adj.
10.
mineral
n.
Paragraph3
11.alternative
n.、adj.
12.
grocery
n.
free
of
14.
instance
n.
for
instance
15.
……,
making
it
ready
for
the
next
batch
of
crops.
16.
depth
n.
17.
root
n.
put
down
deep
roots
18.
entirely
adv.
19.
What
keeps
them
from
doing
so
is
the
fact
that
chemical
farming
serves
the
high
demand
for
food
around
the
world.
what引导主语从句，在从句中做主语；that引导同位语从句，是the
fact的同位语。
阻止他们这样做的原因是化学农业满足了世界各地对粮食的巨大需求。
Step3
Question
Time
Read
the
text
and
answer
the
following
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.
3.
What
is
one
problem
with
the
use
of
chemical
fertilizers?
Crops
grown
with
them
usually
grow
too
fast
to
be
rich
in
nutrition.
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
disease
through
natural
means.
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.
6.
What
is
the
goal
of
using
organic
farming
methods?
Do
you
think
it
can
be
reached?
Why
or
why
not?
1）The
goal
of
using
organic
farming
methods
is
to
grow
good
food
while
avoiding
damage
to
the
environment
or
to
people’s
health.
2）
Yes,
I
think
this
goal
can
be
reached.
People’s
awareness
of
eating
organic
foods
is
increasing.
And
farmers
worked
for
centuries
without
using
any
kinds
of
chemicals
and
without
harming
the
environment,
and
the
food
they
produced
was
just
fine.
Why
could
some
people
not
choose
but
use
man-made
chemicals
in
agriculture？
Because
chemical
farming
still
serves
the
high
demand
for
food
around
the
world
and
organic
farming
is
nowhere
near
able
to
meet
the
need.
Study
be
essential
to/for对……很重要
It
is
essential
that…(should)
do…做……是完全必要的
It
is
essential
for
sb.to
do…对某人来说做……是完全必要的
have
no
alternative/choice
but
to
do
sth.
别无选择只好做某事
have
the
alternative
of
doing
sth.
有做……的选择；可以做……
an
alternative
to…
……的替代品
动词-ing形式短语做结果状语表示自然而然的结果，常用逗号与主句隔开,
有时在其前加副词thus;动词不定式做结果状语往往表示出乎意料的结果
或不好的结果,其前常加only。
Step4
Group
show
Match
the
main
ideas
(A-D)
below
with
the
paragraphs
1-2
D
3A
4C
5B
Discuss
the
advantages
and
disadvantages
of
chemical
farming
and
organic
farming.
And
tell
which
one
you
prefer
and
why.
Tips:
Chemical
farming
Advantages:
fight
crop
diseases,
increase
production
(serve
the
high
demand
for
food
around
the
world)
Disadvantages:
1)pesticide
can
harm
land
and
people’s
health,
kill
helpful
bacteria
and
insects
and
stay
for
a
long
time
and
affect
crops,
animals
and
people
2)chemical
fertilizer
are
not
rich
in
nutrition
and
have
less
flavor
Organic
farming
Advantages:
keep
soil
rich
and
free
from
disease
through
natural
means
Details:
natural
waste
from
animals
as
fertilizer
change
the
kind
of
crop
in
each
field
every
year
plant
diverse
crops
using
different
depths
of
soil
Disadvantages:
unable
to
serve
the
high
demand
for
food
around
the
world
Topic
sentence:
In
my
opinion,
farming
is
preferable
to
farming
because
.
Point1
.
Details
.
Point2
.
Details
.
Point3
.
Details
.
Conclusion
.
Exchange
your
draft
with
a
partner.
Use
the
checklist
to
help
you
review
your
partner’s
draft.
In
my
opinion,
modern
agriculture
is
preferable
to
traditional
agriculture.
First
of
all,
nowadays
most
farmers
grow
crops
with
the
help
of
modern
machines
instead
of
planting
crops
with
their
hands.
As
a
result,
modern
farmers
no
longer
need
to
work
so
hard
as
before.
What’s
more,
the
output
and
working
efficiency
are
also
improved
greatly,
which
contributes
a
lot
to
social-economic
development.
Although
the
fertilisers
and
pesticides
used
in
modern
agriculture
have
destroyed
the
environment
badly,
experts
are
making
efforts
to
get
rid
of
them
and
paying
more
attention
to
the
plant
nutrition
and
protection.
In
a
word，I
am
in
favor
of
modern
agriculture.
Read
the
passage
by
themselves
and
finish
the
related
exercises，using
what
you
have
learned
Read
the
text
and
answer
the
related
questions.
Work
in
groups
Discuss
the
advantages
and
disadvantages
of
chemical
farming
and
organic
farming.
And
tell
which
one
you
prefer
and
why.
Improve
students’
widely
engagement
because
they
can
express
their
opinions.
and
improve
their
abilities
to
capture
the
details
of
reading
passage.
Cultivate
students’
analytical
and
creative
abilities
and
improve
the
ability
of
finding
details
and
competition
Deepen
the
understanding
of
the
text
and
grasp
how
to
introduce
the
difference
between
chemical
farming
and
organic
farming
课堂小结
Step5:Summary:
These
are
what
we’ve
learned
in
this
passage.
See
PPT
Step6
Homework
Use
what
you
have
learned
to
write
an
introduction
chemical
farming
and
organic
farming.
And
tell
which
one
you
prefer
and
why.
（80-120词左右）
板书
Unit5
Working
the
Land
Period5
Chemical
versus
organic
farming
Topic
sentence:
In
my
opinion,
farming
is
preferable
to
farming
because
.
Point1
.
Details
.
Point2
.
Details
.
Point3
.
Details
.
Conclusion
.
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