Unit 2 How do you go to school? 教案

Unit
2
How
do
you
go
to
school？
教案
1教学目标
1.通过学习和测量感知周长的概念,认识什么是perimeter。
2.区别哪些事物具备周长 学习描画事物的边线。
3.设计小组合作的环节,测量身边事物的周长。
4.通过发现生活中的周长,说说观察到的身边的perimeter,让学生们明白周长在生活中的一些用途。让孩子们意识到身边处处是数学,学数学是为了运用于生活,从而增强学生们学习数学的兴趣。
2学情分析
五年级的孩子已经具备了一定的英语基础和语言的表达能力。但毕竟是用英语教授数学知识,因而在设计本课时特别是涉及到数学知识的环节尽量考虑语言的标准,精炼和简单化。仍需要在一些必要的语言词汇上加注中文解释。在数学知识方面,学生已经具备了一定数学知识的积累。对事物的周长有了一定的认识,在此基础上再准确认识周长的概念,测量事物的周长。
3重点难点
通过学习和测量感知事物的周长,使学生认识简单的周长概念。通过学习使学生能够认识封闭图形的周长并且测量,并且发现生活中更多的周长问题。
教学难点:
1.
让学生通过学习,能熟练运用本课数学术语。
2.
使学生通过学习,测量一些生活中物体的周长,并向大家介绍自己的作品。
4教学过程
活动1【导入】perimeter
Warm-up
T:
Hello
boys
and
girls.
I’m
YoYo.
How
are
you
S:
I’m
fine
.Thanks,
how
are
you
T:
I’m
fine.
Nice
to
meet
you.
T:
Please
show
me
your
hands.
Wave
your
hands.
Please
show
me
your
arms.
Follow
me.
Arms
up,
arms
down,
arms
left,
arms
right.
Good,
sit
down
please.
This
girl
pleases
stand
up,
turn
back,
show
me
your
arm,
this
is
my
arm.
Look,
which
is
longer
S:
Teacher’s
arm
is
longer.
T:
Good.
Let’s
look
at
more
pictures,
and
please
tell
me
which
is
longer
All
together.
T:
Look
at
the
first
picture,
which
is
longer
Fish
or
turtle
T:
fish
is
longer
T:
What
are
these
S:
Corn
and
carrot.
T:
Which
is
longer
S:
corn
is
longer.
T:
How
about
these
one
Which
is
longer
Ruler
or
knife
S:
ruler
is
longer.
T:
the
last
picture,
what
are
these
S:
bus
and
car.
T:
which
is
longer
S:
bus
is
longer.
T:
great.
Maybe
these
pictures
are
easy
to
be
seen
which
is
longer,
How
about
these
ones
Which
is
longer
Pencil
or
the
book
Do
you
know
I’m
not
sure
which
is
longer
Can
you
think
How
do
we
know
S:
we
can
use
the
ruler.
T:
So
clever,
we
can
use
the
ruler
to
measure
the
lengths.
Do
you
know
measure
Yes,
we
can
measure
the
book,….(造三个句子,解释词意)。How
about
length
This
is
pencil’s
length,
this
is
finger’s
length.
T:
now
look
at
the
pencil,
how
long
is
it
Can
you
guess
S:
Is
It
….
T:
don’t
forget
the
measure
unit
centimeter.
Look
at
this
word,
It’s
so
long
and
more
difficult,
cm
is
short
for
centimeter.
Understand
I
don’t
know
your
guess
is
right
or
wrong,
we
should
measure
the
pencil’s
length.
But
how
to
measure
Do
you
know
T:
oh,
first
we
should
use
a
ruler.
What’s
the
next
Then,
we
measure
it
to
the
nearest
integer.
What’s
meaning
of
nearest
integer
Yes.(举一个约等于的例子)。
T:
let’s
measure
the
pencil.one
minute.
测量铅笔的长度并且上传。
T:Let’s
share
your
work.看一个孩子的作业请其他孩子判断正确与否。Ok
let’s
continue,
measure
the
length
of
the
book.
S:
学生测量书的长,并且上传答案。
:老师判断答案。Do
you
think
yes
or
no
T:
well
done.
Now
we
have
known
the
length.
Which
is
longer
Presentation
T:
look
at
the
book
again.
Just
look
at
the
face
of
the
book.
What
shape
is
it
S:
rectangle.
T.
How
many
sides
of
the
rectangle
Do
you
know
side
This
is
a
side.
S:
four.
T:
now
we
have
known
this
side
is
about
19cm.how
about
other
sides
Can
you
measure
测量书的其他三条边长是多少,并且上传结果。
:Let’s
look
at
your
work.老师定正学生的测量答案。
How
long
are
the
other
sides
S:
It’s
about
….
T:
We
have
measured
around
the
edge
of
the
book.do
you
know
around
(板书在黑板上)。Like
this,
look.
(黑板上出现走一圈的动画图案)
:
When
we
measure
around
the
edge
of
the
book,
we
can
know
it’s_____
S:
perimeter.
T:yes
very
good.板书标题perimeter.
学生读周长的定义。
:
please
talk
to
your
partners.
What
is
perimeter
学生相互说。
Practice
T:
Look
at
these
shapes,
do
they
have
perimeter
(发送分类练习)
:完成练习并且上传。
:选两个孩子的作业进行对比检查。They
are
all
right.
Why
do
they
have
perimeter
S:
They
are
closed
shape.
板书closed.
Do
you
know
closed
指出两个封闭的图形。
:
We
have
known
just
only
closed
shapes
have
perimeter.
T:Look
at
these
closed
shapes
.draw
their
sidelines.下发作业
:学生完成画边线的作业,并且上传。
:老师订正作业。
Activity
:
look
around
our
classroom.
Measure
the
perimeter
of
objects
in
our
classroom.
学生在教室完成测量事物周长的活动,并且填写卡片,将最后的测量结果拍照上传。
:I
measured
a
book.
S2:
The
perimeter
is
…..
:In
our
life
perimeter
is
everwhere.
Where
is
perimeter
Can
you
find
4students
in
a
group,
let’s
discuss
where
is
perimeter
学生们来说一说生活中的周长问题。
T:
From
what
you
say,
we
know
perimeter
is
everywhere,
this
is
teacher’s
finding,
let’s
watch
a
video.
学生看一段老师制作的视频。
:
Perimeter
is
in
our
life,
please
use
your
eyes
to
find.
T:
At
last,
look
at
this
question.
Maybe
it’s
not
easy.
You
should
think
over.
T:
Draw
a
triangle
that
has
a
perimeter
of
10cm.
please
try
it
on
your
paper.
T:I
have
another
way
.don’t
use
the
ruler.
Look,
this
is
a
line.
The
length
is
about
10cm,
I
make
it
into
a
triangle,
and
draw
it
with
the
shape.
Understand
Homework
T:
Maybe
you
have
better
ideas,
please
try
to
do
it,
that’s
also
today’s
homework.
T:
That’s
all
for
today.
Goodbye.