(共14张PPT)
Unit
2
Saving
the
Earth
Topic2
All
these
problems
are
very
serious.
Section
A
pollution
many
trees
cut
down
forests
gone
wash
the
earth
away
冲走
change
into
desert
转换成，变成
沙漠
e.g.
A
lot
of
rich
land
has
changed
into
desert
because
people
have
cut
down
too
many
trees.
sandstorms
come
into
being
n.
沙尘暴
The
boy
and
girls
are
talking
about
—————.
different
types
of
sandstorms
the
reasons
for
sandstorms
sandstorms
in
different
cities
1b
Listen
to
1a
and
choose
the
best
answer.
Focus
on
the
main
idea
of
the
conversation
when
you
listen
for
the
first
time.
√
Listen
and
answer
the
questions
1.What’s
the
weather
like
today
?
It’s
bad.
The
wind
is
so
strong
.
And
the
sand
really
hurts
face.
2.What
causes
these
sandstorms
?
People
have
cut
down
too
many
trees.
As
a
result,
a
lot
of
rich
land
has
changed
into
desert.
3.Do
we
still
need
to
do
something
to
protect
the
environment
?
Yes,
we
do.
Although
we
have
built
“The
Green
Great
Wall”,
we
still
need
to
do
something
to
protect
the
environment
.
conj.
虽然，尽管，即使
n.沙
1c
Read
1a
and
complete
trees’
functions.
Trees
can
stop
the
wind
from
blowing
the
earth
away.
A
lot
of
water
can
be
saved
by
forests.
They
can
also
stop
the
water
from
washing
the
earth
away.
Tree’s
functions
2
Complete
the
sentences
with
the
correct
forms
of
the
given
phrases
in
the
box.
as
a
result,
change
into,
do
something,
stop…from,
blow…away
1.People
have
cut
down
such
a
large
number
of
trees
that
the
land
_____________________desert.
2.There
are
fewer
trees
left,
so
the
wind
always
_______
the
earth
________.
3.Air
pollution
has
become
a
serious
problem,
so
we
must
______________
to
reduce
it.
4.we
should
try
our
best
to
_________
people
________
cutting
down
the
trees.
5.In
the
future,
human
beings
can
protect
the
trees
well.
_____________,
animals
will
live
a
happy
life
in
the
forest.
has
changed
into
blows
away
do
something
stop
from
As
a
result
3
Do
you
know
how
sandstorms
come
into
being?
Number
the
pictures
and
talk
about
the
sandstorm
in
groups.
(
)
(
)
(
)
(
)
(
)
(
)
4
1
5
3
6
2
wash
the
earth
away
many
trees
change
into
desert
forests
gone
sandstorms
come
into
being
cut
down
trees
We
learn:
1.Some
words:
sand,
although
2.Some
phrases:
change
into,
human
being
3.Some
sentences:
(1)As
a
result,
a
lot
of
rich
land
has
changed
into
desert.
(2)Trees
can
stop
the
wind
from
blowing
the
earth
away.
We
can:
1.
Use
the
indefinite
pronoun
and
adverb.
2.Talk
about
the
sandstorm
and
its
harm.
Summary
Read
1a.
Memorize
the
useful
expressions
and
key
sentences
which
we
learn
today.
Finish
Section
A
in
your
workbook.
Preview
Section
B.
Thank
you!Unit
2
Saving
the
Earth
Topic
2
All
these
problems
are
very
serious.
Section
A
Ⅰ.
Material
analysis
1.
本课是九年级第二单元第二话题的第一课时。主要活动是1a。1a通过Kangkang向他的同伴Maria和Jane抱怨恶劣的天气，引出本课的功能意念：抱怨和责备。1b主要培养听力策略，即重点听对话的大意。1c侧重于考查归纳总结的能力。在2中，通过“用所给词的正确形式填空”这种题型，巩固1a中的重点语言点。借助3的图片和信息提示，进一步形象地了解沙尘暴形成的过程。本课通过谈论沙尘暴的成因说明了树木对环境保护的重要作用。同时也让学生了解天气与人类活动的关系，关注全球的环境问题。
2.
由于整堂课是使用希沃5软件来展示，所以我把希沃5里的内容以pptx.的格式导出上传。
Ⅱ.Teaching
aims
1.Knowledge
aims：
掌握本课的重点词汇和短语，谈论沙尘暴的成因。
2.Skill
aims:
能听懂谈论沙尘暴成因的对话。
能够从所听材料中获得有效的细节信息。
能够根据课文信息发现树的功能。
3.
Emotional
aims:
(optional)
让学生了解环境污染的严峻形势，引导学生爱护大自然，爱护花草树木，树立绿色环保意识。
4.
Culture
awareness:
(optional)
通过课文的学习，让学生了解沙尘暴形成的原因和过程，关注全球的环境问题。
Ⅲ.
The
key
points
and
difficult
points
1.
Key
points:
Words
and
phrases:
sand,
although,
sandstorm,
desert,
human
being,
reduce,
completely,
change
into,
stop
…
from,
blow/
wash
…
away,
as
a
result
Sentences:
A
lot
of
water
can
be
saved
by
forests.
Although
we
have
built
“The
Green
Great
Wall”,
we
still
need
to
do
something
to
protect
the
environment.
Grammar:
Indefinite
pronoun
and
adverb.
2.
Difficult
points：
能够从所听材料中获得有效的细节信息来补全句子。
能够根据课文信息复述树的功能，引导学生爱护大自然，爱护花草树木，树立绿色环保意识。
Ⅳ.
Learning
strategies
通过引导学生在听前阅读1b和3，培养学生形成听前熟悉、预测听力材料的学习习惯。
通过3中的插图预测并描述新话题，培养学生的逻辑推理能力。
Ⅴ.
Teaching
aids
关于各种污染的图片，沙尘暴的图片等。
Ⅵ.
Teaching
procedures
一．Getting
students
ready
for
learning（5
mins)
1.Review
the
Present
Perfect.(复习现在完成时)
2.Look
at
the
pictures
about
all
kinds
of
pollution
and
a
sandstorm
and
let
Ss
guess
what
kind
of
weather
it
is.
二．Lead-in
Show
the
pictures
of
a
sandstorm,
talk
about
how
sandstorm
comes
into
being
.
三．Pre-listening
Let
the
Ss
talk
about
sandstorm
according
to
the
pictures
and
the
given
words
in
1a.
四．While-listening
Step
1:
Present
the
picture
in
1a.
Let
the
Ss
listen
to
1a
once
and
do
1b
alone.
Step
2:
Let
the
Ss
listen
to
1a
again
and
complete
the
functions
of
trees
in
1c.
They
can
discuss
in
pairs.
五．Post-listening
Step
1:
Let
the
Ss
read
1a
in
groups
and
then
role
play
it.
Step2:
Let
the
Ss
read
again
and
find
the
important
phrases
in
1a.
Then
write
them
down
on
the
Blackboard.
Step
3:
Lead
the
Ss
to
complete
the
sentences
with
the
correct
forms
of
the
given
phrases
in
the
box
in
2.
六．Finishing
Task
1.
Finish
2.
2.
Check
the
answer.
3.
Finish
3
to
review.
七．Summarizing
and
Assigning
homework
Step
1:
Sum
up
what
they
have
learnt
in
this
class.
Step
2:
HMK:
Write
a
passage
about
how
sandstorm
comes
into
being.
