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Resea
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20
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p
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2107
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Address
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g
lo
ba
l perspec
t
iv
es a
nd
M
a
la
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sia
n educatio
na
l strategies
Sy
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Azm
a
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s
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Siti
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im
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Art
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ticle
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R
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ed
Oct
1
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2
0
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4
R
ev
is
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Feb
12
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2
0
2
5
Acc
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ted
Mar
6
,
202
5
Un
d
e
rsta
n
d
i
n
g
fra
c
ti
o
n
s
is
a
sig
n
ifi
c
a
n
t
c
h
a
ll
e
n
g
e
i
n
m
a
th
e
m
a
ti
c
s
e
d
u
c
a
ti
o
n
g
lo
b
a
ll
y
,
i
n
c
lu
d
in
g
i
n
M
a
la
y
sia
,
wh
e
re
stu
d
e
n
ts
o
ften
stru
g
g
le
with
c
o
r
e
c
o
n
c
e
p
ts.
T
h
e
se
d
iffi
c
u
lt
ies
h
in
d
e
r
th
e
ir
p
ro
g
re
ss
io
n
in
to
a
d
v
a
n
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d
a
re
a
s
li
k
e
ra
ti
o
s,
p
r
o
p
o
rti
o
n
s
,
a
n
d
a
lg
e
b
ra
.
Th
is
p
a
p
e
r
p
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p
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a
c
o
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c
e
p
t
u
a
l
fra
m
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wo
rk
to
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h
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ts
’
u
n
d
e
rsta
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g
o
f
fra
c
ti
o
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s
,
with
a
fo
c
u
s
o
n
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e
M
a
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e
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u
c
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ti
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.
Dra
win
g
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li
tera
tu
re
a
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d
p
ra
c
t
ice
s
fro
m
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tern
a
ti
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a
l
c
o
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tex
ts,
t
h
is
p
a
p
e
r
e
m
p
h
a
siz
e
s
th
e
imp
o
rtan
c
e
o
f
v
isu
a
l
m
o
d
e
ls,
m
a
n
ip
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tec
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As
a
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p
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p
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th
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siz
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sig
h
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trate
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ti
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c
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ti
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n
.
Th
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m
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h
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ts
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e
e
d
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n
m
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c
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tern
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a
l
c
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rr
icu
lu
m
.
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y
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d
in
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s
su
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g
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st
t
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t
th
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u
se
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c
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to
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rn
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ts,
in
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re
so
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Th
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o
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tc
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m
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s in
fra
c
ti
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e
d
u
c
a
ti
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n
.
K
ey
w
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s
:
C
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ce
p
tu
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s
tan
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in
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E
d
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ca
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p
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licy
Fra
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Ma
th
em
atics e
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ca
tio
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T
ea
ch
in
g
s
tr
ateg
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T
h
is i
s
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p
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n
a
c
c
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ss
a
rticle
u
n
d
e
r th
e
CC B
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SA
li
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C
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p
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A
uth
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:
Sy
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Azm
an
Sy
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I
s
m
ail
Facu
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f
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ca
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U
n
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aa
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Ma
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B
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E
m
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az
m
an
8
6
@
g
m
ail.
c
o
m
1.
I
NT
RO
D
UCT
I
O
N
Ma
th
em
atics
ed
u
ca
tio
n
g
lo
b
ally
r
ec
o
g
n
izes
f
r
ac
tio
n
s
as
an
ess
en
tial
elem
en
t,
p
lay
in
g
a
v
ital
r
o
le
in
p
av
in
g
th
e
wa
y
f
o
r
a
d
ee
p
er
u
n
d
er
s
tan
d
i
n
g
o
f
c
o
m
p
lex
m
a
th
em
atica
l
p
r
in
cip
les
s
u
c
h
as
r
atio
s
,
p
r
o
p
o
r
tio
n
s
,
d
ec
im
als
an
d
p
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ce
n
tag
es.
De
s
p
ite
th
eir
cr
itical
r
o
le,
s
tu
d
en
ts
o
f
ten
f
in
d
f
r
ac
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s
ch
allen
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t
o
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asp
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T
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d
an
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l
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ca
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tem
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co
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ly
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allen
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d
cu
ltu
r
al
s
ettin
g
s
ar
o
u
n
d
th
e
wo
r
l
d
[
1
]
–
[
4
]
.
I
n
Ma
lay
s
ia,
th
e
Stan
d
ar
d
C
u
r
r
icu
lu
m
f
o
r
Prim
ar
y
Sch
o
o
ls
(
KSSR
)
em
p
h
asizes
f
r
ac
tio
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s
as
a
k
e
y
s
u
b
ject
f
r
o
m
y
ea
r
1
to
y
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r
6
,
with
t
h
e
ex
p
ec
tatio
n
t
h
at
s
tu
d
en
ts
will a
cq
u
ir
e
p
r
o
f
icien
cy
in
b
o
th
co
n
ce
p
tu
al
an
d
o
p
e
r
atio
n
al
asp
ec
ts
o
f
f
r
ac
tio
n
s
[
5
]
.
T
h
e
ch
allen
g
e
o
f
m
aster
in
g
f
r
ac
tio
n
s
is
n
o
t
lim
ited
to
Ma
lay
s
ia;
it
is
a
co
m
m
o
n
is
s
u
e
wo
r
ld
wid
e
.
Stu
d
ies
in
d
icate
th
at
s
tu
d
en
ts
o
f
ten
h
a
v
e
d
if
f
icu
lties
tr
an
s
itio
n
in
g
f
r
o
m
wh
o
le
n
u
m
b
er
s
to
f
r
ac
tio
n
s
,
lead
in
g
to
co
n
ce
p
tu
al
m
is
u
n
d
er
s
tan
d
i
n
g
s
,
s
u
ch
as
t
h
e
b
elief
th
at
m
u
lt
ip
ly
in
g
f
r
ac
tio
n
s
in
c
r
ea
s
e
th
e
ir
v
alu
e,
b
ased
o
n
th
eir
ex
p
er
ien
ce
with
wh
o
le
n
u
m
b
er
s
[
6
]
–
[
8
]
.
Azm
i
et
a
l.
[
9
]
f
o
u
n
d
th
at
Ma
lay
s
ian
s
tu
d
en
ts
d
em
o
n
s
tr
ated
lo
w
f
r
ac
tio
n
n
u
m
b
er
s
en
s
e,
w
h
ich
was
clo
s
ely
lin
k
ed
to
th
e
ir
o
v
e
r
all
p
o
o
r
p
er
f
o
r
m
a
n
ce
in
m
ath
em
atics.
T
h
is
is
s
u
e
is
m
ir
r
o
r
ed
in
in
ter
n
atio
n
al
s
tu
d
ies,
in
clu
d
in
g
th
e
U
n
ited
States
,
wh
er
e
th
e
Natio
n
al
Ass
es
s
m
en
t
o
f
E
d
u
ca
tio
n
al
Pr
o
g
r
ess
(
NAE
P)
co
n
s
is
ten
tly
s
h
o
ws
lo
wer
p
e
r
f
o
r
m
a
n
ce
in
f
r
ac
tio
n
-
r
elate
d
task
s
co
m
p
ar
ed
to
o
th
er
m
ath
em
atica
l a
r
ea
s
[
1
0
]
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8
8
2
2
I
n
t
J
E
v
al
&
R
es E
d
u
c
,
Vo
l
.
14
,
No
.
3
,
J
u
n
e
20
25
:
2
1
0
7
-
2
1
1
7
2108
T
h
ese
p
er
s
is
ten
t
ch
allen
g
es
in
f
r
ac
tio
n
c
o
m
p
r
eh
en
s
io
n
a
f
f
ec
t
n
o
t
o
n
ly
s
tu
d
en
ts
’
p
er
f
o
r
m
an
ce
in
m
ath
em
atics
b
u
t
also
th
eir
ab
ilit
y
to
ap
p
ly
m
ath
em
atica
l
c
o
n
ce
p
ts
in
r
ea
l
-
life
s
itu
atio
n
s
[
1
1
]
–
[
1
4
]
.
W
ith
o
u
t
ad
d
r
ess
in
g
th
ese
ch
allen
g
es
ea
r
ly
o
n
,
s
tu
d
en
ts
m
ay
f
ac
e
d
if
f
icu
lties
in
m
o
r
e
ad
v
an
ce
d
to
p
ics
s
u
ch
as
alg
eb
r
a
an
d
g
e
o
m
etr
y
[
1
5
]
.
T
h
u
s
,
t
h
e
g
a
p
b
e
t
w
e
e
n
p
r
o
c
e
d
u
r
a
l
f
l
u
e
n
c
y
a
n
d
c
o
n
c
e
p
t
u
a
l
u
n
d
e
r
s
t
a
n
d
i
n
g
n
e
e
d
s
t
o
b
e
a
d
d
r
e
s
s
e
d
t
h
r
o
u
g
h
i
n
n
o
v
a
t
i
v
e
te
a
c
h
i
n
g
s
t
r
at
e
g
i
es
t
h
a
t
h
el
p
s
t
u
d
e
n
t
s
b
u
i
l
d
a
s
o
l
i
d
u
n
d
e
r
s
ta
n
d
in
g
o
f
f
r
a
c
t
i
o
n
s
[
1
6
]
.
T
h
is
p
ap
er
ex
p
l
o
r
es
b
o
th
g
lo
b
al
an
d
lo
ca
l
(
Ma
lay
s
ian
)
ch
all
en
g
es
s
tu
d
en
ts
f
ac
e
in
lear
n
in
g
f
r
ac
tio
n
s
an
d
p
r
o
p
o
s
es
ef
f
ec
tiv
e
s
tr
ateg
ies
f
o
r
im
p
r
o
v
i
n
g
f
r
ac
tio
n
co
m
p
r
eh
e
n
s
io
n
.
Sp
ec
if
ically
,
it
ad
d
r
ess
es
th
e
r
esear
ch
q
u
esti
o
n
:
w
h
at
ar
e
th
e
m
o
s
t
ef
f
ec
tiv
e
teac
h
in
g
m
eth
o
d
s
an
d
s
tr
ateg
ies
f
o
r
i
m
p
r
o
v
i
n
g
s
tu
d
e
n
ts
’
co
n
ce
p
tu
al
u
n
d
er
s
tan
d
in
g
o
f
f
r
ac
tio
n
s
?
T
h
e
p
r
o
p
o
s
ed
s
o
lu
tio
n
is
a
co
m
p
r
eh
en
s
iv
e
f
r
am
e
wo
r
k
th
at
in
teg
r
ates
v
is
u
al
m
o
d
els,
m
an
ip
u
lativ
e
s
an
d
tech
n
o
lo
g
y
in
to
f
r
ac
t
io
n
in
s
tr
u
ctio
n
.
T
h
ese
s
tr
ateg
ies,
d
r
awn
f
r
o
m
in
ter
n
atio
n
al
b
est
p
r
ac
tices
a
n
d
ad
a
p
ted
t
o
lo
ca
l
n
ee
d
s
,
o
f
f
er
a
tailo
r
ed
ap
p
r
o
ac
h
to
en
h
an
ci
n
g
f
r
ac
tio
n
lear
n
in
g
in
Ma
la
y
s
ia.
T
h
e
n
o
v
elty
o
f
th
is
s
tu
d
y
lies
in
its
s
y
n
th
esis
o
f
g
lo
b
al
p
e
r
s
p
ec
tiv
es
with
lo
ca
l
ed
u
ca
tio
n
al
s
tr
ateg
ies.
B
y
d
r
awin
g
o
n
e
x
is
tin
g
liter
atu
r
e
an
d
r
ec
en
t
s
tu
d
ies,
th
e
f
in
d
in
g
s
p
r
o
v
id
e
v
alu
a
b
le
in
s
ig
h
t
s
f
o
r
ed
u
ca
to
r
s
an
d
p
o
licy
m
ak
er
s
,
o
f
f
er
in
g
a
p
r
a
ctica
l
r
o
ad
m
ap
f
o
r
im
p
r
o
v
in
g
f
r
ac
tio
n
in
s
tr
u
ctio
n
.
T
h
e
i
n
teg
r
atio
n
o
f
v
is
u
al
m
o
d
els,
m
an
i
p
u
lativ
es
an
d
tec
h
n
o
lo
g
y
is
n
o
t
o
n
ly
ess
en
tial
f
o
r
en
h
an
cin
g
s
tu
d
en
ts
’
c
o
n
ce
p
tu
al
u
n
d
e
r
s
tan
d
in
g
b
u
t a
ls
o
f
o
r
alig
n
in
g
teac
h
in
g
m
eth
o
d
s
with
th
e
d
e
m
an
d
s
o
f
m
o
d
er
n
ed
u
ca
tio
n
al
s
y
s
tem
s
[
1
7
]
,
[
1
8
]
.
2.
I
NSI
G
H
T
S IN
T
O
F
RAC
T
I
O
N
E
DUCA
T
I
O
N
Gr
asp
in
g
th
e
co
n
ce
p
t
o
f
f
r
ac
tio
n
s
is
a
well
-
k
n
o
wn
h
u
r
d
le
in
th
e
f
ield
o
f
m
at
h
em
atics
ed
u
ca
tio
n
,
u
n
d
er
s
co
r
i
n
g
it
i
s
v
ital
r
o
le.
Nu
m
er
o
u
s
s
tu
d
ies
h
a
v
e
ex
p
lo
r
ed
wh
at
m
a
k
es
f
r
ac
tio
n
s
p
ar
t
icu
lar
ly
ch
allen
g
in
g
f
o
r
s
tu
d
e
n
ts
,
with
s
ch
o
lar
s
ag
r
ee
in
g
th
at
t
h
eir
ab
s
tr
ac
t
n
at
u
r
e
r
eq
u
i
r
es
a
s
h
if
t
in
u
n
d
er
s
t
an
d
in
g
t
h
at
ca
n
b
e
o
v
er
wh
elm
in
g
f
o
r
m
an
y
lear
n
er
s
[
3
]
,
[
4
]
.
T
h
is
o
v
er
v
iew
h
i
g
h
lig
h
ts
cr
u
cial
r
esear
ch
co
n
c
er
n
in
g
th
e
s
tr
u
g
g
les
s
tu
d
en
ts
f
ac
e
with
f
r
ac
tio
n
s
an
d
th
e
s
u
g
g
ested
s
tr
ateg
ies to
a
d
d
r
ess
th
ese
is
s
u
es.
A
p
iv
o
tal
c
o
n
tr
ib
u
tio
n
to
th
is
to
p
ic
was
m
a
d
e
b
y
Sieg
ler
e
t
a
l.
[
1
9
]
,
wh
o
p
o
in
ted
o
u
t
th
e
in
tr
icate
n
o
tio
n
s
en
co
m
p
ass
in
g
f
r
ac
tio
n
s
,
s
u
ch
as th
e
id
ea
s
o
f
p
ar
t to
wh
o
le,
eq
u
iv
alen
c
y
an
d
f
r
ac
ti
o
n
o
p
er
atio
n
s
.
T
h
eir
wo
r
k
r
e
v
ea
led
t
h
at
s
tu
d
en
ts
f
r
eq
u
en
tly
lack
a
d
ee
p
g
r
asp
o
f
th
ese
c
o
n
ce
p
ts
,
lea
d
in
g
t
o
en
d
u
r
in
g
m
is
tak
es
wh
en
wo
r
k
in
g
with
f
r
ac
tio
n
s
.
W
ith
o
u
t
a
s
o
lid
f
o
u
n
d
atio
n
in
f
r
ac
tio
n
c
o
n
ce
p
ts
,
s
tu
d
en
ts
m
ay
r
eso
r
t
to
m
em
o
r
izatio
n
o
r
in
c
o
r
r
ec
t
p
r
o
ce
d
u
r
al
m
eth
o
d
s
,
lead
in
g
to
s
y
s
tem
atic
er
r
o
r
s
in
th
eir
m
ath
em
atica
l
r
ea
s
o
n
in
g
[
2
0
]
,
[
2
1
]
.
T
h
is
s
tu
d
y
h
as
u
n
d
er
p
in
n
e
d
a
lo
t
o
f
th
e
co
n
tin
u
in
g
e
x
am
in
atio
n
in
to
h
o
w
f
r
ac
tio
n
s
ar
e
lear
n
ed
.
Su
b
s
eq
u
en
t r
esear
ch
b
y
J
ian
g
et
a
l.
[
2
2
]
co
n
f
ir
m
ed
th
ese
o
b
s
er
v
atio
n
s
,
f
in
d
in
g
th
at
s
tu
d
en
t
s
o
f
ten
f
all
b
ac
k
o
n
r
ea
s
o
n
in
g
b
ased
o
n
wh
o
le
n
u
m
b
er
s
in
f
r
ac
tio
n
al
c
o
n
tex
ts
,
wh
ich
ca
n
ca
u
s
e
co
n
s
is
ten
t
m
is
s
tep
s
.
Fo
r
in
s
tan
ce
,
a
co
m
m
o
n
e
r
r
o
r
am
o
n
g
s
tu
d
en
ts
is
th
e
m
is
u
n
d
er
s
tan
d
i
n
g
th
at
a
f
r
ac
tio
n
with
a
b
ig
g
er
n
u
m
er
ato
r
is
alwa
y
s
g
r
ea
ter
,
a
m
is
co
n
ce
p
t
io
n
th
at
b
ec
o
m
es
n
o
ticea
b
le
as
th
ey
s
h
if
t
f
r
o
m
wh
o
le
n
u
m
b
er
ca
lc
u
latio
n
s
to
f
r
ac
tio
n
o
p
e
r
atio
n
s
[
2
3
]
,
[
2
4
]
.
A
k
ey
p
r
o
b
lem
id
e
n
ti
f
ied
is
th
at
s
tu
d
en
ts
o
f
ten
f
in
d
it
d
if
f
icu
lt
to
d
ev
elo
p
a
co
m
p
r
eh
e
n
s
iv
e
co
n
ce
p
tu
al
u
n
d
er
s
tan
d
i
n
g
o
f
f
r
a
ctio
n
s
,
wh
ich
is
ess
en
tial
f
o
r
p
r
o
p
er
ly
e
x
ec
u
tin
g
alg
o
r
ith
m
s
[
1
7
]
.
T
h
e
s
ig
n
if
ican
ce
o
f
a
co
n
ce
p
t
u
al
g
r
asp
is
em
p
h
asized
f
u
r
th
er
in
Ob
er
s
tein
er
et
a
l.
[
2
5
]
in
v
esti
g
atio
n
in
to
th
e
co
g
n
itiv
e
ch
allen
g
es
s
tu
d
en
ts
f
ac
e
with
f
r
ac
tio
n
s
.
T
h
ey
id
en
tifie
d
th
at
n
u
m
e
r
o
u
s
s
tu
d
en
ts
clin
g
to
f
lawe
d
y
et
in
tu
itiv
e
b
elief
s
ab
o
u
t
f
r
ac
tio
n
s
,
s
u
ch
as
th
e
n
o
tio
n
th
at
m
u
ltip
licatio
n
o
f
f
r
ac
tio
n
s
in
v
ar
iab
ly
in
cr
ea
s
es
th
e
v
alu
e.
Su
ch
m
is
co
n
ce
p
tio
n
s
ar
e
r
o
o
ted
in
a
f
u
n
d
am
en
tal
m
is
u
n
d
e
r
s
tan
d
in
g
o
f
f
r
ac
tio
n
co
n
ce
p
ts
,
f
u
r
th
er
co
m
p
licatin
g
s
tu
d
en
t
s
’
ab
ilit
y
to
p
er
f
o
r
m
f
r
ac
tio
n
o
p
er
atio
n
s
co
r
r
ec
tly
[
2
6
]
.
T
h
ese
d
ee
p
-
s
ea
ted
m
is
co
n
ce
p
tio
n
s
p
r
o
v
e
h
ar
d
to
co
r
r
ec
t,
p
ar
ticu
lar
ly
wh
en
tr
a
d
itio
n
al
teac
h
in
g
f
o
c
u
s
es
m
o
r
e
o
n
m
em
o
r
izatio
n
th
an
o
n
u
n
d
er
s
tan
d
in
g
co
n
c
ep
ts
[
2
7
]
.
Mo
r
e
r
ec
en
tly
,
B
r
aith
waite
an
d
Sieg
ler
[
2
8
]
in
v
esti
g
ated
h
o
w
u
n
d
er
s
tan
d
i
n
g
wh
o
le
n
u
m
b
er
s
an
d
f
r
ac
tio
n
s
d
ev
elo
p
to
g
et
h
er
.
T
h
ey
s
u
g
g
est
th
at
s
tu
d
en
ts
s
tr
u
g
g
lin
g
with
f
r
ac
tio
n
s
o
f
ten
d
o
n
o
t
f
ir
m
ly
g
r
asp
h
o
w
wh
o
le
n
u
m
b
er
s
an
d
f
r
ac
tio
n
s
d
if
f
er
co
n
ce
p
tu
ally
.
T
h
is
lack
o
f
u
n
d
er
s
tan
d
i
n
g
ca
n
p
o
s
e
h
u
r
d
le
s
n
o
t
ju
s
t
in
lear
n
in
g
f
r
ac
tio
n
s
b
u
t
also
in
tack
lin
g
m
o
r
e
c
o
m
p
lex
m
ath
e
m
atica
l
ar
ea
s
lik
e
alg
e
b
r
a
an
d
g
eo
m
et
r
y
.
T
h
e
c
r
itical
d
iv
id
e
in
co
m
p
r
eh
en
s
io
n
b
etwe
en
wh
o
le
n
u
m
b
er
s
an
d
f
r
ac
tio
n
s
r
ep
r
esen
ts
a
s
ig
n
if
ican
t h
u
r
d
le
[
2
9
]
.
T
o
ad
d
r
ess
th
e
co
n
ce
p
tu
al
c
h
a
llen
g
es
in
f
r
ac
tio
n
co
m
p
r
eh
e
n
s
io
n
,
r
ec
e
n
t
r
esear
ch
h
as
s
h
if
t
ed
to
war
d
s
m
o
r
e
in
ter
ac
tiv
e
an
d
m
u
lti
-
m
o
d
al
s
tr
ateg
ies
th
at
em
p
h
a
s
ize
co
n
ce
p
tu
al
u
n
d
er
s
tan
d
in
g
o
v
er
p
r
o
ce
d
u
r
al
f
lu
en
cy
.
W
ilk
ie
an
d
R
o
ch
e
[
3
0
]
o
f
f
er
v
al
u
ab
le
in
s
ig
h
ts
in
to
th
e
p
r
ef
er
r
ed
s
tr
ateg
ies
u
s
ed
b
y
p
r
im
ar
y
teac
h
er
s
f
o
r
teac
h
in
g
f
r
ac
tio
n
s
.
T
h
e
s
tu
d
y
em
p
h
asizes
th
e
im
p
o
r
tan
ce
o
f
ch
o
o
s
in
g
ap
p
r
o
p
r
iate
f
r
ac
tio
n
m
o
d
els
an
d
m
an
ip
u
lativ
es
th
at
alig
n
with
s
tu
d
en
ts
’
co
n
ce
p
tu
al
d
ev
elo
p
m
e
n
t.
T
h
is
ap
p
r
o
ac
h
r
ef
lects
b
r
o
a
d
e
r
r
ec
o
m
m
en
d
atio
n
s
in
th
e
liter
atu
r
e,
as
o
th
e
r
s
tu
d
ies,
s
u
ch
as
Kar
ik
a
an
d
C
s
ík
o
s
[
3
1
]
,
also
h
ig
h
lig
h
t
th
e
c
r
itical
r
o
le
o
f
v
is
u
al
r
ep
r
esen
tatio
n
s
in
en
h
an
ci
n
g
s
tu
d
e
n
ts
’
u
n
d
e
r
s
tan
d
in
g
o
f
f
r
ac
tio
n
s
.
T
h
e
p
r
ef
er
r
ed
m
o
d
els
an
d
m
an
ip
u
lativ
es a
r
e
s
u
m
m
a
r
ized
in
T
ab
le
1
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t
J
E
v
al
&
R
es E
d
u
c
I
SS
N:
2252
-
8
8
2
2
A
d
d
r
ess
in
g
fr
a
ctio
n
co
mp
r
eh
e
n
s
io
n
:
g
lo
b
a
l p
ers
p
ec
tives a
n
d
Ma
la
ysia
n
…
(
S
ye
d
A
z
ma
n
S
y
ed
I
s
ma
il
)
2109
T
ab
le
1
.
Pre
f
e
r
r
ed
f
r
ac
tio
n
m
o
d
els f
o
r
en
h
an
cin
g
f
r
ac
tio
n
co
m
p
r
eh
en
s
io
n
C
a
t
e
g
o
r
y
M
o
d
e
l
/
t
o
o
l
D
e
scri
p
t
i
o
n
F
r
a
c
t
i
o
n
m
o
d
e
l
s
f
o
r
t
e
a
c
h
i
n
g
S
e
t
m
o
d
e
l
s
Te
a
c
h
e
r
s
f
a
v
o
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se
t
m
o
d
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l
s
a
s
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y
h
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l
p
s
t
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t
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r
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t
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o
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scr
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j
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t
s,
ma
k
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p
a
r
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h
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t
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h
i
p
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a
s
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r
t
o
u
n
d
e
r
st
a
n
d
.
R
e
c
t
a
n
g
l
e
m
o
d
e
l
s
R
e
c
t
a
n
g
l
e
m
o
d
e
l
s
a
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u
sef
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l
f
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r
d
i
v
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d
i
n
g
i
n
t
o
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q
u
a
l
p
a
r
t
s
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h
e
l
p
i
n
g
st
u
d
e
n
t
s
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n
d
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r
s
t
a
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u
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a
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d
t
h
e
si
g
n
i
f
i
c
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o
f
n
u
mera
t
o
r
s
a
n
d
d
e
n
o
mi
n
a
t
o
r
s.
U
se
o
f
man
i
p
u
l
a
t
i
v
e
s
F
r
a
c
t
i
o
n
b
a
r
s
F
r
a
c
t
i
o
n
b
a
r
s
e
f
f
e
c
t
i
v
e
l
y
sh
o
w
f
r
a
c
t
i
o
n
s
i
n
a
l
i
n
e
a
r
f
o
r
ma
t
,
u
sef
u
l
f
o
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t
e
a
c
h
i
n
g
e
q
u
i
v
a
l
e
n
c
e
a
n
d
i
n
t
e
g
r
a
t
i
o
n
w
i
t
h
n
u
m
b
e
r
l
i
n
e
s
.
C
u
i
se
n
a
i
r
e
r
o
d
s
a
n
d
g
e
o
b
o
a
r
d
s
Ta
c
t
i
l
e
t
o
o
l
s
l
i
k
e
C
u
i
se
n
a
i
r
e
r
o
d
s
a
n
d
g
e
o
b
o
a
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d
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o
f
f
e
r
h
a
n
d
s
-
o
n
l
e
a
r
n
i
n
g
e
x
p
e
r
i
e
n
c
e
s
,
h
e
l
p
i
n
g
s
t
u
d
e
n
t
s
u
n
d
e
r
st
a
n
d
m
o
r
e
c
o
m
p
l
e
x
c
o
n
c
e
p
t
s
l
i
k
e
mi
x
e
d
n
u
m
b
e
r
s a
n
d
f
r
a
c
t
i
o
n
m
u
l
t
i
p
l
i
c
a
t
i
o
n
.
M
u
l
t
i
-
mo
d
e
l
a
p
p
r
o
a
c
h
C
o
m
b
i
n
e
d
u
s
e
o
f
c
o
n
t
i
n
u
o
u
s
a
n
d
d
i
s
c
r
e
t
e
m
o
d
e
l
s
C
o
m
b
i
n
i
n
g
b
o
t
h
r
e
c
t
a
n
g
l
e
(
c
o
n
t
i
n
u
o
u
s)
a
n
d
se
t
(
d
i
s
c
r
e
t
e
)
m
o
d
e
l
s
w
i
t
h
man
i
p
u
l
a
t
i
v
e
s
l
i
k
e
f
r
a
c
t
i
o
n
b
a
r
s
e
n
h
a
n
c
e
s
st
u
d
e
n
t
s
’
u
n
d
e
r
st
a
n
d
i
n
g
a
n
d
f
l
u
e
n
c
y
w
i
t
h
d
i
f
f
e
r
e
n
t
f
r
a
c
t
i
o
n
r
e
p
r
e
se
n
t
a
t
i
o
n
s
.
R
esear
ch
b
y
Şen
g
ü
l
an
d
Z
o
r
a
[
3
2
]
f
u
r
th
er
s
u
p
p
o
r
ts
th
e
u
s
e
o
f
m
an
ip
u
lativ
es,
d
em
o
n
s
tr
atin
g
th
at
s
tu
d
en
ts
wh
o
u
s
e
f
r
ac
tio
n
b
ar
s
an
d
r
o
d
s
ca
n
en
g
ag
e
m
o
r
e
ef
f
ec
tiv
ely
with
f
r
ac
tio
n
-
r
elat
ed
task
s
,
im
p
r
o
v
in
g
th
eir
n
u
m
b
er
s
en
s
e.
T
h
ese
m
an
ip
u
lativ
es
p
r
o
v
id
e
v
is
u
al
an
d
tactile
aid
s
th
at
h
elp
s
tu
d
en
ts
g
r
asp
ab
s
tr
ac
t
f
r
ac
tio
n
c
o
n
ce
p
ts
,
e
n
ab
lin
g
th
em
to
d
e
v
elo
p
a
s
tr
o
n
g
er
f
o
u
n
d
atio
n
i
n
m
ath
em
atics.
M
o
r
eo
v
er
,
s
tu
d
ies
lik
e
Am
o
-
Asan
te
an
d
B
o
n
y
ah
[
3
3
]
alo
n
g
with
Vess
o
n
en
et
a
l.
[
3
4
]
h
ig
h
li
g
h
t
th
at
m
a
n
ip
u
lativ
es
n
ee
d
to
b
e
in
teg
r
ated
in
to
a
b
r
o
a
d
er
co
n
ce
p
tu
al
f
r
am
ew
o
r
k
th
at
in
c
lu
d
es
p
r
o
b
lem
-
s
o
lv
in
g
a
p
p
lic
atio
n
s
an
d
ac
tiv
e
lear
n
in
g
s
tr
ateg
ies.
W
h
en
u
s
ed
with
in
th
is
co
m
p
r
eh
en
s
iv
e
ap
p
r
o
ac
h
,
m
an
ip
u
lativ
es
n
o
t
o
n
ly
en
h
a
n
ce
p
r
o
ce
d
u
r
al
k
n
o
wled
g
e
b
u
t
also
p
r
o
m
o
te
d
ee
p
er
c
o
n
ce
p
t
u
al
u
n
d
er
s
tan
d
i
n
g
,
eq
u
ip
p
in
g
s
tu
d
en
ts
to
ap
p
ly
th
eir
f
r
ac
tio
n
s
k
ills
to
m
o
r
e
c
o
m
p
le
x
m
ath
em
atica
l p
r
o
b
lem
s
[
3
5
]
.
T
h
ese
f
in
d
i
n
g
s
ar
e
co
n
s
is
ten
t
with
in
ter
n
atio
n
al
ass
ess
m
en
ts
,
s
u
ch
as
th
e
NAE
P
[
1
0
]
,
wh
ic
h
co
n
s
is
ten
tly
h
ig
h
lig
h
t
th
at
s
tu
d
en
ts
’
g
r
asp
o
f
f
r
ac
tio
n
s
is
wea
k
er
th
a
n
o
th
er
ar
ea
s
o
f
m
ath
em
atics.
I
n
th
e
eig
h
th
g
r
a
d
e,
m
an
y
s
tu
d
en
t
s
s
tr
u
g
g
led
with
f
r
ac
tio
n
c
o
n
ce
p
ts
,
p
ar
ticu
lar
l
y
wh
en
ap
p
ly
in
g
t
h
em
to
p
r
o
b
lem
-
s
o
lv
in
g
s
ce
n
ar
io
s
.
T
h
is
is
s
u
e
is
n
o
t
c
o
n
f
in
e
d
to
t
h
e
Un
ited
States
;
s
tu
d
ies
f
r
o
m
Als
h
ah
r
i
[
3
6
]
an
d
Ko
r
et
a
l.
[
3
7
]
in
d
icate
th
at
s
tu
d
en
ts
in
Ma
lay
s
ia
an
d
o
th
er
g
lo
b
al
co
n
tex
ts
ex
p
er
ie
n
ce
s
im
ilar
d
if
f
icu
lties
in
m
aster
in
g
f
r
ac
tio
n
co
n
ce
p
ts
.
T
r
u
jill
o
et
a
l.
[
3
8
]
also
n
o
te
th
at
th
ese
ch
allen
g
es
a
r
e
u
n
iv
er
s
al
an
d
t
h
at
n
e
w
teac
h
in
g
s
tr
ateg
ies an
d
cu
r
r
icu
lu
m
r
ev
is
io
n
s
ar
e
n
ee
d
ed
t
o
i
m
p
r
o
v
e
f
r
ac
tio
n
lear
n
in
g
o
u
tc
o
m
es g
lo
b
ally
.
3.
M
E
T
H
O
D
T
h
is
p
ap
er
ad
o
p
ts
a
co
n
ce
p
t
-
d
r
iv
en
ap
p
r
o
ac
h
aim
ed
at
ad
d
r
ess
in
g
th
e
ch
allen
g
es
o
f
f
r
ac
tio
n
co
m
p
r
eh
e
n
s
io
n
in
m
ath
em
ati
cs
ed
u
ca
tio
n
.
I
n
s
tead
o
f
co
n
d
u
ctin
g
an
em
p
ir
ical
s
tu
d
y
o
r
a
f
o
r
m
al
liter
atu
r
e
r
ev
iew,
th
e
c
o
n
ce
p
tu
al
f
r
am
e
wo
r
k
p
r
esen
ted
h
e
r
e
is
d
ev
elo
p
ed
th
r
o
u
g
h
an
an
aly
s
is
o
f
est
ab
lis
h
ed
ed
u
ca
tio
n
al
th
eo
r
ies
an
d
p
r
ac
tical
teac
h
in
g
ex
p
er
ien
ce
s
.
T
h
e
c
o
n
ce
p
t
p
ap
er
s
y
n
th
esizes
in
s
ig
h
ts
f
r
o
m
e
d
u
ca
tio
n
al
th
e
o
r
ies
an
d
r
ec
en
t
s
tu
d
ies,
alo
n
g
s
id
e
th
e
ch
allen
g
es
f
ac
ed
b
y
s
tu
d
en
ts
in
Ma
lay
s
ia
an
d
o
th
er
g
lo
b
al
co
n
tex
ts
,
to
p
r
o
p
o
s
e
a
f
r
am
ew
o
r
k
th
at
alig
n
s
with
b
o
th
lo
ca
l
an
d
in
ter
n
a
tio
n
al
cu
r
r
ic
u
lu
m
r
e
q
u
ir
em
e
n
t
s
.
T
h
e
o
b
jectiv
e
is
to
p
r
o
p
o
s
e
s
tr
ateg
ies
f
o
r
im
p
r
o
v
in
g
f
r
ac
tio
n
co
m
p
r
eh
en
s
io
n
b
y
s
y
n
th
esizin
g
in
s
ig
h
ts
f
r
o
m
k
e
y
r
esear
ch
s
tu
d
ies o
n
teac
h
in
g
m
eth
o
d
s
,
b
o
th
g
l
o
b
ally
an
d
with
in
th
e
Ma
lay
s
ian
ed
u
ca
tio
n
al
co
n
tex
t
.
T
o
co
n
s
tr
u
ct
t
h
is
f
r
am
ewo
r
k
,
r
elev
an
t
r
esear
ch
s
tu
d
ies
a
n
d
ed
u
ca
tio
n
al
r
e
p
o
r
ts
wer
e
ex
am
in
ed
,
p
ar
ticu
lar
ly
t
h
o
s
e
f
o
c
u
s
in
g
o
n
th
e
u
s
e
o
f
teac
h
in
g
s
tr
ate
g
ies
s
u
ch
as
v
is
u
al
m
o
d
els,
m
an
ip
u
lativ
es
a
n
d
tech
n
o
lo
g
y
in
en
h
an
cin
g
co
n
ce
p
tu
al
u
n
d
er
s
tan
d
in
g
.
T
h
e
s
tu
d
y
also
in
co
r
p
o
r
ates
in
s
ig
h
ts
f
r
o
m
Ma
lay
s
ia
’
s
KSSR
,
wh
ich
h
ig
h
lig
h
ts
f
r
ac
t
io
n
ed
u
ca
tio
n
as
a
c
r
itical
co
m
p
o
n
e
n
t
o
f
th
e
n
atio
n
al
m
ath
em
atics
cu
r
r
icu
lu
m
.
T
h
e
f
r
am
ewo
r
k
d
r
aws
f
r
o
m
g
lo
b
al
ed
u
ca
tio
n
al
p
r
ac
tices,
in
clu
d
in
g
th
o
s
e
f
r
o
m
co
u
n
tr
i
es
th
at
f
ac
e
s
im
ilar
ch
allen
g
es
in
f
r
ac
tio
n
e
d
u
ca
t
io
n
.
T
h
is
m
eth
o
d
o
lo
g
y
aim
s
to
b
u
ild
a
co
m
p
r
eh
e
n
s
iv
e,
ad
ap
tab
le
m
o
d
el
f
o
r
en
h
an
cin
g
f
r
ac
tio
n
ed
u
ca
tio
n
,
g
r
o
u
n
d
ed
i
n
th
eo
r
etica
l in
s
ig
h
ts
an
d
p
r
ac
tical
teac
h
in
g
s
tr
ateg
ies.
T
h
e
an
aly
s
is
p
r
o
ce
s
s
in
v
o
l
v
e
d
s
y
n
th
esizin
g
th
ese
k
e
y
in
s
ig
h
ts
to
c
o
m
p
ar
e
an
d
co
n
tr
a
s
t
v
ar
io
u
s
teac
h
in
g
s
tr
ateg
ies
ac
r
o
s
s
d
if
f
er
en
t
ed
u
ca
tio
n
al
s
y
s
tem
s
.
T
h
is
co
m
p
ar
ativ
e
ap
p
r
o
ac
h
allo
wed
f
o
r
th
e
id
en
tific
atio
n
o
f
c
o
m
m
o
n
c
h
a
llen
g
es
an
d
s
u
cc
ess
f
u
l
in
ter
v
e
n
tio
n
s
u
s
ed
in
d
iv
er
s
e
c
o
n
tex
ts
.
B
y
f
o
cu
s
in
g
o
n
b
o
th
g
lo
b
al
a
n
d
lo
ca
l
(
M
alay
s
ian
)
p
er
s
p
ec
tiv
es,
t
h
e
f
r
am
ewo
r
k
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.
4.
I
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DUC
AT
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P
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4
.
1
.
Student
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E
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’
g
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asp
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if
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tly
b
o
o
s
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th
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o
v
er
all
s
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cc
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in
m
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m
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A
s
a
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n
d
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f
o
r
ad
v
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m
a
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co
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p
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,
p
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ce
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
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25
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2110
ar
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A
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p
ics,
th
u
s
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h
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m
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em
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k
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T
h
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asic
co
m
p
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n
s
io
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b
ec
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m
es
cr
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tack
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m
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r
o
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g
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t th
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ed
u
ca
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jo
u
r
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ey
.
R
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esear
ch
u
n
d
er
s
co
r
es
th
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im
p
o
r
tan
ce
o
f
m
a
n
ip
u
l
ativ
es
in
im
p
r
o
v
in
g
s
tu
d
en
ts
’
f
r
ac
tio
n
co
m
p
r
eh
e
n
s
io
n
.
Stu
d
y
b
y
Far
r
a
et
a
l.
[
3
9
]
s
h
o
wed
th
at
b
o
th
v
ir
tu
al
an
d
co
n
cr
ete
m
an
i
p
u
lat
iv
es
h
ad
a
p
o
s
itiv
e
im
p
ac
t o
n
s
tu
d
en
ts
’
lear
n
in
g
o
f
f
r
ac
tio
n
o
p
er
atio
n
s
,
p
a
r
ticu
lar
ly
in
f
o
s
ter
in
g
a
b
etter
u
n
d
e
r
s
tan
d
in
g
o
f
ad
d
itio
n
an
d
s
u
b
tr
ac
tio
n
o
f
f
r
ac
tio
n
s
.
S
im
ilar
ly
,
Şen
g
ü
l
an
d
Z
o
r
a
[
3
2
]
em
p
h
asized
th
e
r
o
le
o
f
in
t
u
itiv
e
u
n
d
er
s
tan
d
in
g
d
ev
elo
p
e
d
th
r
o
u
g
h
m
a
n
ip
u
lat
iv
es,
wh
ich
ca
n
h
elp
b
r
id
g
e
p
r
o
ce
d
u
r
al
a
n
d
co
n
ce
p
tu
al
k
n
o
wled
g
e
g
ap
s
i
n
s
tu
d
en
ts
.
T
h
e
s
tu
d
y
b
y
T
ad
eu
[
4
0
]
also
s
u
p
p
o
r
ts
th
is
v
iew,
in
d
icatin
g
th
at
ch
ild
r
en
wh
o
u
s
e
m
an
ip
u
lativ
es
f
r
o
m
an
ea
r
l
y
ag
e
s
h
o
w
b
ette
r
lo
n
g
-
ter
m
r
eten
tio
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an
d
ap
p
licatio
n
o
f
f
r
ac
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co
n
ce
p
ts
,
wh
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is
cr
u
cial
f
o
r
th
eir
p
r
o
g
r
ess
io
n
in
m
ath
e
m
atics.
Ad
d
itio
n
ally
,
Alq
ah
ta
n
i
et
a
l.
[
4
1
]
f
o
u
n
d
th
at
p
r
eser
v
ice
teac
h
er
s
wh
o
lear
n
e
d
f
r
ac
tio
n
s
th
r
o
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g
h
b
o
th
d
is
cr
ete
an
d
co
n
tin
u
o
u
s
m
o
d
el
s
d
ev
elo
p
ed
a
d
ee
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er
u
n
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er
s
tan
d
in
g
o
f
h
o
w
to
teac
h
th
ese
c
o
n
ce
p
ts
ef
f
ec
tiv
ely
.
T
h
is
in
s
ig
h
t
is
cr
itical
f
o
r
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tu
d
en
t
o
u
tco
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es,
as
teac
h
er
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’
u
n
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er
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tan
d
i
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d
ir
ec
tly
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ce
s
th
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ab
ilit
y
to
teac
h
f
r
ac
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s
in
a
way
th
at
p
r
o
m
o
tes
lo
n
g
-
ter
m
r
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tio
n
an
d
co
n
ce
p
t
u
al
u
n
d
er
s
tan
d
in
g
.
T
h
e
im
p
ac
t
o
f
ef
f
ec
tiv
e
f
r
ac
tio
n
in
s
tr
u
ctio
n
o
n
s
tu
d
en
t
o
u
tco
m
es
is
f
u
r
th
e
r
s
u
p
p
o
r
ted
b
y
B
r
u
ce
et
a
l.
[
4
2
]
,
wh
ich
s
h
o
wed
th
at
n
u
m
b
er
lin
es
an
d
u
n
it
f
r
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ctio
n
s
ar
e
p
ar
ticu
lar
ly
ef
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ec
ti
v
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in
h
elp
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g
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tu
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ts
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tan
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p
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q
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p
p
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l
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a
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n
i
n
g
i
n
m
o
r
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a
d
v
a
n
c
e
d
m
a
t
h
e
m
a
t
i
ca
l
a
r
e
as
.
Fu
r
th
er
m
o
r
e
,
m
aster
in
g
f
r
ac
ti
o
n
s
h
as
s
ig
n
if
ican
t
co
n
s
eq
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en
ce
s
f
o
r
lo
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g
-
ter
m
ac
ad
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ic
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h
iev
em
en
t.
Stu
d
ies
h
av
e
r
e
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ea
ted
ly
d
em
o
n
s
tr
ated
th
at
s
tr
u
g
g
les
with
f
r
a
ctio
n
s
ar
e
in
d
icativ
e
o
f
f
u
tu
r
e
d
if
f
icu
lties
in
m
o
r
e
co
m
p
lex
m
ath
em
atics
to
p
ic
s
[
4
3
]
.
E
ar
ly
i
n
ter
v
en
tio
n
an
d
e
q
u
ip
p
in
g
s
tu
d
e
n
ts
with
th
e
n
ec
ess
ar
y
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n
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er
s
tan
d
i
n
g
o
f
f
r
ac
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s
c
an
p
av
e
th
e
way
f
o
r
c
o
n
tin
u
ed
s
u
cc
ess
in
m
at
h
em
atics
an
d
o
th
er
s
cien
ce
,
tech
n
o
lo
g
y
,
en
g
in
e
er
in
g
,
a
n
d
m
ath
em
atics
(
STE
M
)
f
ield
s
.
T
h
ese
s
tu
d
ies
h
ig
h
lig
h
t
th
at
co
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cr
ete
ex
p
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ca
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d
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g
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f
f
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f
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ca
to
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s
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ab
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t
o
o
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g
s
tu
d
en
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’
co
n
ce
p
tu
al
u
n
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er
s
tan
d
in
g
.
Ho
wev
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,
f
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esear
ch
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n
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d
ed
to
ex
p
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e
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o
w
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ese
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l
s
im
p
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t
lo
n
g
-
ter
m
r
eten
tio
n
o
f
f
r
ac
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co
n
ce
p
ts
.
4
.
2
.
E
du
ca
t
io
na
l pra
ct
ices
T
h
e
p
er
s
is
ten
t
ch
allen
g
es
in
teac
h
in
g
f
r
ac
tio
n
s
u
n
d
er
s
co
r
e
th
e
lim
itatio
n
s
o
f
tr
a
d
itio
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al
m
eth
o
d
s
f
o
cu
s
ed
o
n
r
o
te
m
em
o
r
izatio
n
an
d
p
r
o
c
ed
u
r
e
-
b
ased
teac
h
i
n
g
.
R
esear
ch
in
cr
ea
s
in
g
ly
ad
v
o
ca
tes
f
o
r
s
h
if
tin
g
to
war
d
p
ed
a
g
o
g
ical
ap
p
r
o
ac
h
e
s
th
at
p
r
io
r
itize
co
n
ce
p
tu
al
u
n
d
er
s
tan
d
in
g
,
wh
e
r
e
s
tu
d
en
ts
ca
n
g
r
asp
th
e
“
wh
y
”
b
eh
in
d
m
ath
e
m
atica
l p
r
o
ce
s
s
es [
4
4
]
.
C
o
n
cr
ete
m
o
d
els,
m
an
ip
u
lativ
es a
n
d
tech
n
o
l
o
g
y
-
b
ased
to
o
ls
p
lay
p
iv
o
ta
l
r
o
les in
m
ak
in
g
ab
s
tr
ac
t m
ath
e
m
atica
l c
o
n
ce
p
ts
m
o
r
e
ta
n
g
ib
l
e
f
o
r
lear
n
er
s
[
4
5
]
.
Fo
r
ex
am
p
le,
r
ec
e
n
t
s
tu
d
ies
h
av
e
d
em
o
n
s
tr
ated
th
e
ef
f
ec
tiv
en
ess
o
f
u
s
in
g
v
is
u
al
aid
s
,
s
u
ch
as
ar
e
a
m
o
d
els
an
d
n
u
m
b
e
r
lin
es,
to
en
h
an
ce
s
tu
d
en
ts
’
u
n
d
e
r
s
tan
d
in
g
o
f
f
r
ac
tio
n
al
r
elatio
n
s
h
ip
s
[
3
9
]
.
T
h
is
ap
p
r
o
a
ch
h
elp
s
s
tu
d
en
ts
v
is
u
alize
a
n
d
i
n
ter
n
alize
k
e
y
f
r
ac
tio
n
co
n
ce
p
ts
,
m
o
v
in
g
b
ey
o
n
d
m
er
e
p
r
o
ce
d
u
r
al
p
r
o
f
icie
n
cy
.
R
esear
ch
b
y
Alq
ah
tan
i
et
a
l.
[
4
1
]
f
u
r
th
e
r
s
u
p
p
o
r
ts
th
e
in
te
g
r
atio
n
o
f
b
o
t
h
d
is
cr
ete
an
d
co
n
tin
u
o
u
s
m
o
d
els,
h
elp
in
g
s
tu
d
e
n
ts
cr
ea
te
d
ee
p
e
r
co
n
n
ec
tio
n
s
b
etwe
en
d
if
f
e
r
en
t
r
ep
r
esen
tatio
n
s
o
f
f
r
ac
tio
n
s
.
T
h
is
co
m
b
i
n
ed
ap
p
r
o
ac
h
r
ein
f
o
r
ce
s
th
e
co
n
ce
p
tu
al
an
d
v
is
u
al
u
n
d
er
s
tan
d
i
n
g
o
f
f
r
ac
tio
n
s
,
o
f
f
e
r
in
g
a
m
o
r
e
co
h
esiv
e
lear
n
in
g
ex
p
er
ien
ce
.
A
s
tu
d
y
b
y
Prih
a
n
tin
i
et
a
l.
[
4
4
]
em
p
h
asized
th
e
im
p
o
r
ta
n
ce
o
f
in
te
g
r
atin
g
v
i
r
tu
al
m
an
ip
u
lativ
es
with
p
h
y
s
ical
m
o
d
els
to
cr
ea
t
e
a
b
len
d
ed
lear
n
in
g
en
v
ir
o
n
m
en
t
th
at
is
b
o
th
in
ter
ac
tiv
e
a
n
d
en
g
a
g
in
g
.
Vir
tu
al
p
latf
o
r
m
s
,
s
u
ch
as
f
r
ac
tio
n
g
a
m
es
an
d
s
im
u
latio
n
ap
p
s
,
als
o
o
f
f
er
o
p
p
o
r
t
u
n
ities
f
o
r
s
tu
d
en
ts
to
ap
p
ly
th
ese
co
n
ce
p
ts
in
v
a
r
io
u
s
s
ce
n
ar
io
s
,
s
tr
en
g
th
en
in
g
th
eir
u
n
d
er
s
tan
d
in
g
[
4
6
]
.
Sh
if
tin
g
to
th
ese
s
tu
d
en
t
-
ce
n
t
er
ed
ap
p
r
o
ac
h
es
r
e
q
u
ir
es
ed
u
ca
to
r
s
to
u
n
d
er
g
o
s
u
b
s
tan
tial
ch
an
g
es
in
th
eir
in
s
tr
u
ctio
n
al
tech
n
i
q
u
es.
Mo
v
in
g
awa
y
f
r
o
m
lectu
r
e
-
ce
n
tr
ic
teac
h
in
g
to
m
o
r
e
ex
p
lo
r
a
to
r
y
a
n
d
h
an
d
s
-
o
n
lear
n
in
g
is
n
ec
ess
ar
y
f
o
r
f
o
s
t
er
in
g
a
d
ee
p
er
co
m
p
r
eh
e
n
s
io
n
o
f
f
r
ac
tio
n
s
[
4
7
]
.
R
esear
ch
f
r
o
m
T
ad
e
u
[
4
0
]
in
d
icate
s
th
at
v
is
u
al
t
o
o
ls
,
w
h
en
u
s
ed
in
tan
d
em
with
i
n
ter
ac
tiv
e
teac
h
in
g
,
s
ig
n
if
ica
n
tly
en
h
a
n
ce
s
tu
d
e
n
ts
’
co
g
n
itiv
e
en
g
ag
em
e
n
t
with
f
r
ac
tio
n
s
,
h
elp
in
g
th
em
tr
an
s
it
io
n
f
r
o
m
s
u
r
f
ac
e
-
le
v
el
u
n
d
er
s
tan
d
in
g
to
d
ee
p
er
co
m
p
r
eh
e
n
s
io
n
.
Fra
ctio
n
m
o
d
els,
s
u
ch
as
s
e
t
m
o
d
els
an
d
C
u
is
en
air
e
r
o
d
s
,
h
av
e
s
h
o
wn
p
r
o
m
is
e
in
aid
in
g
s
tu
d
en
ts
’
ab
ilit
y
to
v
is
u
alize
an
d
u
n
d
er
s
tan
d
f
r
ac
tio
n
eq
u
iv
alen
ce
,
as
s
u
g
g
ested
b
y
r
ec
en
t
s
tu
d
ies
[
3
3
]
.
Mo
r
eo
v
er
,
r
esear
ch
s
u
p
p
o
r
ts
th
e
in
teg
r
atio
n
o
f
d
ig
ital
to
o
ls
lik
e
v
ir
tu
al
m
an
ip
u
lativ
es
an
d
ed
u
ca
tio
n
al
s
o
f
twar
e
to
cr
ea
te
m
o
r
e
d
y
n
a
m
ic
lear
n
in
g
e
x
p
er
ien
ce
s
.
T
h
is
s
h
if
t
to
war
d
s
in
n
o
v
ativ
e
f
r
ac
tio
n
in
s
tr
u
ctio
n
also
r
eq
u
ir
es
s
ig
n
if
ican
t
in
v
estme
n
t
in
teac
h
er
tr
ain
in
g
an
d
p
r
o
f
ess
io
n
al
d
ev
e
lo
p
m
en
t.
T
ea
ch
e
r
s
n
ee
d
co
n
s
is
ten
t
ex
p
o
s
u
r
e
to
th
e
latest
r
esear
ch
an
d
to
o
ls
in
m
ath
em
atics
ed
u
ca
tio
n
,
p
ar
tic
u
lar
ly
in
f
r
ac
tio
n
i
n
s
tr
u
ctio
n
[
4
8
]
.
On
g
o
in
g
p
r
o
f
ess
io
n
al
d
ev
elo
p
m
en
t
p
r
o
g
r
am
s
ar
e
cr
u
cial
f
o
r
e
q
u
ip
p
i
n
g
teac
h
er
s
with
th
e
n
ec
ess
ar
y
s
k
ills
to
i
n
teg
r
ate
v
is
u
al
an
d
i
n
ter
a
ctiv
e
m
eth
o
d
s
in
to
th
eir
teac
h
in
g
r
ep
er
to
i
r
e.
Ad
d
itio
n
ally
,
r
esear
ch
s
u
g
g
ests
th
at
well
-
tr
ain
ed
ed
u
ca
to
r
s
wh
o
em
p
lo
y
d
i
v
er
s
e
teac
h
in
g
s
tr
ateg
ies
ar
e
m
o
r
e
lik
ely
to
f
ac
ilit
ate
s
ig
n
if
ica
n
t
im
p
r
o
v
em
en
ts
i
n
s
tu
d
en
ts
’
u
n
d
er
s
tan
d
in
g
o
f
f
r
ac
tio
n
s
[
4
9
]
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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t
J
E
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&
R
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N:
2252
-
8
8
2
2
A
d
d
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in
g
fr
a
ctio
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co
mp
r
eh
e
n
s
io
n
:
g
lo
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l p
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p
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tives a
n
d
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la
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…
(
S
ye
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A
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ma
n
S
y
ed
I
s
ma
il
)
2111
4
.
3
.
P
o
licy
im
pli
ca
t
io
ns
T
h
e
n
ee
d
to
b
o
o
s
t
f
r
ac
tio
n
u
n
d
er
s
tan
d
in
g
tr
an
s
ce
n
d
s
class
r
o
o
m
b
o
u
n
d
a
r
ies,
im
p
ac
tin
g
ed
u
ca
tio
n
al
p
o
licy
d
o
m
ain
s
.
Giv
en
th
at
f
r
ac
tio
n
s
s
er
v
e
as
a
f
o
u
n
d
atio
n
al
elem
en
t
f
o
r
m
aster
in
g
m
o
r
e
co
m
p
lex
m
ath
em
atica
l
co
n
ce
p
ts
,
it
i
s
ess
en
tial
f
o
r
th
o
s
e
d
esig
n
in
g
cu
r
r
icu
lu
m
s
to
p
r
o
v
id
e
am
p
le
lea
r
n
in
g
o
p
p
o
r
tu
n
ities
th
at
tack
le
th
e
n
u
an
ce
s
o
f
f
r
ac
tio
n
s
b
ef
o
r
e
s
tu
d
en
ts
m
o
v
e
o
n
to
m
o
r
e
ch
allen
g
in
g
ar
ea
s
s
u
ch
as
r
atio
s
,
p
r
o
p
o
r
tio
n
s
an
d
alg
eb
r
a.
T
h
is
g
o
al
m
ig
h
t
n
ec
ess
itate
a
r
ev
i
ew
an
d
r
ef
r
esh
o
f
n
atio
n
al
m
ath
cu
r
r
icu
l
u
m
s
to
f
o
cu
s
m
o
r
e
o
n
u
n
d
er
s
tan
d
in
g
co
n
ce
p
ts
r
ath
e
r
th
a
n
j
u
s
t
m
em
o
r
izin
g
p
r
o
ce
d
u
r
es.
Fo
r
in
s
tan
ce
,
th
e
in
teg
r
atio
n
o
f
m
o
r
e
h
an
d
s
-
o
n
lear
n
in
g
ai
d
s
,
co
n
ce
p
tu
al
teac
h
in
g
m
et
h
o
d
s
an
d
p
r
ac
tical
ex
am
p
les
i
n
Ma
lay
s
ia
’
s
KSS
R
co
u
ld
s
ig
n
if
ican
tly
im
p
r
o
v
e
ea
r
ly
m
aster
y
o
f
f
r
ac
tio
n
s
[
4
4
]
.
R
ec
en
t
s
tu
d
ies
s
u
g
g
est
th
at
co
u
n
tr
ies
with
co
m
p
r
eh
e
n
s
iv
e
cu
r
r
icu
lu
m
r
ef
o
r
m
s
e
m
p
h
asizin
g
co
n
ce
p
tu
al
lear
n
in
g
o
v
e
r
r
o
t
e
m
em
o
r
izatio
n
ten
d
to
o
u
tp
er
f
o
r
m
o
th
er
s
in
in
ter
n
atio
n
a
l
ass
es
s
m
en
ts
[
4
0
]
.
C
o
u
n
tr
ies
lik
e
Sin
g
ap
o
r
e
an
d
Fin
lan
d
,
wh
ich
h
av
e
ad
o
p
ted
s
u
ch
p
r
ac
tices,
h
av
e
co
n
s
is
ten
tly
r
an
k
ed
h
ig
h
i
n
f
r
ac
tio
n
co
m
p
r
eh
e
n
s
io
n
an
d
o
v
er
all
m
ath
em
atica
l
liter
ac
y
[
5
0
]
.
T
h
ese
ex
am
p
les
p
r
o
v
i
d
e
v
alu
ab
le
in
s
ig
h
ts
in
to
h
o
w
p
o
licy
a
d
ju
s
tm
en
ts
ca
n
en
h
an
ce
n
atio
n
al
ed
u
ca
ti
o
n
al
o
u
tco
m
es.
E
ar
ly
i
n
ter
v
e
n
tio
n
s
tr
ateg
ies
ar
e
cr
u
cial.
R
esear
ch
h
as
s
h
o
wn
a
d
ir
ec
t
co
r
r
elatio
n
b
etwe
en
ea
r
ly
m
aster
y
o
f
f
r
ac
tio
n
s
an
d
later
s
u
cc
ess
in
ad
v
an
ce
d
m
ath
em
atics a
n
d
ST
E
M
f
ield
s
[
4
3
]
.
As a
r
esu
lt,
ed
u
ca
tio
n
al
p
o
licy
m
ak
er
s
s
h
o
u
ld
m
ak
e
it a
p
r
io
r
ity
to
s
tr
en
g
th
e
n
f
r
ac
tio
n
teac
h
in
g
in
th
e
i
n
itial
y
ea
r
s
o
f
ed
u
ca
t
io
n
an
d
s
u
p
p
o
r
t
th
is
with
co
n
t
in
u
o
u
s
p
r
o
f
ess
io
n
al
d
ev
elo
p
m
e
n
t f
o
r
teac
h
er
s
.
Mo
r
eo
v
er
,
in
ter
n
atio
n
al
ass
ess
m
en
ts
lik
e
th
e
Pro
g
r
am
f
o
r
I
n
ter
n
atio
n
al
Stu
d
e
n
t
Ass
ess
m
en
t
(
PISA)
an
d
T
r
en
d
s
in
I
n
te
r
n
atio
n
al
Ma
th
em
atics
an
d
Scien
ce
Stu
d
y
(
T
I
MSS)
o
f
f
er
u
s
ef
u
l
m
etr
ics
f
o
r
p
o
licy
m
ak
er
s
to
g
au
g
e
an
d
c
o
m
p
ar
e
th
eir
n
a
tio
n
’
s
m
ath
p
er
f
o
r
m
an
ce
,
p
a
r
ticu
lar
ly
in
f
r
ac
tio
n
s
.
Su
cc
ess
f
u
l
co
u
n
tr
ies
in
th
ese
ass
es
s
m
en
ts
ty
p
ically
em
p
lo
y
ef
f
ec
tiv
e
teac
h
in
g
m
eth
o
d
s
an
d
p
o
licies
th
at
p
r
o
m
o
te
cr
itical
th
in
k
in
g
,
ex
p
er
ien
tial
lear
n
in
g
an
d
th
e
p
r
ac
tical
a
p
p
licatio
n
o
f
m
ath
co
n
ce
p
ts
,
as
n
o
ted
b
y
Z
h
an
g
et
a
l.
[
5
1
]
.
L
ev
er
ag
in
g
th
e
in
s
ig
h
ts
f
r
o
m
h
ig
h
-
p
e
r
f
o
r
m
in
g
co
u
n
tr
ies
in
PISA
an
d
T
I
MSS,
n
atio
n
al
ed
u
ca
tio
n
p
o
licies
ca
n
b
e
r
estru
ctu
r
e
d
to
f
o
cu
s
o
n
f
o
s
ter
in
g
d
ee
p
e
r
u
n
d
er
s
tan
d
in
g
th
r
o
u
g
h
p
r
ac
tical
an
d
p
r
o
b
lem
-
s
o
lv
in
g
a
p
p
r
o
ac
h
es
[
4
1
]
.
T
h
ese
s
u
cc
ess
s
to
r
ies ca
n
s
er
v
e
as b
en
c
h
m
ar
k
s
f
o
r
r
e
f
o
r
m
in
g
f
r
ac
tio
n
e
d
u
ca
tio
n
.
Ass
es
s
m
en
t
m
eth
o
d
s
also
n
ee
d
to
ev
o
lv
e
to
m
o
r
e
ac
cu
r
ately
r
ef
lect
a
s
tu
d
en
t
’
s
co
n
ce
p
tu
al
g
r
asp
o
f
f
r
ac
tio
n
s
,
r
at
h
er
th
a
n
ju
s
t
p
r
o
c
ed
u
r
al
p
r
o
wess
.
T
r
ad
itio
n
al
te
s
tin
g
m
eth
o
d
s
o
f
ten
m
is
s
th
e
m
ar
k
in
ca
p
tu
r
in
g
a
s
tu
d
en
t
’
s
d
ee
p
u
n
d
er
s
tan
d
in
g
o
f
f
r
ac
tio
n
s
,
p
o
ten
tially
lead
in
g
to
p
r
o
g
r
ess
io
n
with
a
s
h
a
k
y
f
o
u
n
d
atio
n
th
at
co
u
ld
im
p
e
d
e
f
u
tu
r
e
m
ath
em
atica
l
ac
h
iev
em
en
ts
[
5
2
]
.
I
t
i
s
im
p
er
ativ
e
to
im
p
lem
e
n
t
ass
ess
m
en
t
tech
n
iq
u
es
th
at
ch
allen
g
e
s
tu
d
en
ts
to
s
h
o
wca
s
e
th
eir
an
aly
tical
an
d
p
r
o
b
lem
-
s
o
lv
in
g
s
k
ills
in
f
r
ac
tio
n
-
r
elate
d
s
ce
n
ar
i
o
s
an
d
th
eir
a
p
p
licatio
n
in
r
ea
l
-
lif
e
s
itu
atio
n
s
.
It
i
s
im
p
o
r
tan
t
f
o
r
teac
h
er
s
to
h
av
e
ac
ce
s
s
to
m
o
d
e
r
n
tea
ch
in
g
to
o
ls
,
in
clu
d
in
g
v
ir
t
u
al
an
d
d
ig
ital
r
eso
u
r
ce
s
[
3
0
]
,
wh
ic
h
h
av
e
b
e
en
p
r
o
v
en
t
o
en
h
an
ce
c
o
n
ce
p
t
u
al
u
n
d
e
r
s
tan
d
in
g
am
o
n
g
s
tu
d
en
ts
.
Fu
r
th
er
m
o
r
e,
ass
es
s
m
en
ts
d
esig
n
ed
to
m
ea
s
u
r
e
b
o
t
h
p
r
o
ce
d
u
r
al
an
d
co
n
ce
p
tu
al
s
k
ills
p
r
o
v
id
e
b
etter
d
ia
g
n
o
s
tic
in
s
ig
h
ts
in
to
s
tu
d
en
ts
’
f
r
ac
tio
n
u
n
d
er
s
tan
d
i
n
g
[
3
0
]
.
Su
ch
ass
ess
m
en
ts
ca
n
o
f
f
er
a
m
o
r
e
n
u
an
ce
d
u
n
d
er
s
t
an
d
in
g
o
f
s
tu
d
en
ts
’
s
tr
en
g
th
s
an
d
wea
k
n
ess
es,
all
o
win
g
f
o
r
m
o
r
e
tar
g
eted
in
ter
v
en
tio
n
s
an
d
s
u
p
p
o
r
t
in
th
e
lear
n
in
g
p
r
o
ce
s
s
.
B
y
u
p
d
atin
g
cu
r
r
icu
lu
m
g
u
id
elin
e
s
,
r
ef
in
in
g
ass
ess
m
en
t
m
eth
o
d
s
an
d
em
b
ed
d
in
g
p
r
o
v
en
s
tr
at
eg
ies
in
to
n
atio
n
al
ed
u
ca
tio
n
al
p
o
licies,
g
o
v
er
n
m
en
ts
an
d
ed
u
ca
tio
n
al
b
o
d
ies
ca
n
n
u
r
tu
r
e
a
lear
n
in
g
en
v
i
r
o
n
m
en
t
th
at
p
r
o
m
o
tes
a
th
o
r
o
u
g
h
u
n
d
er
s
tan
d
in
g
o
f
f
r
a
ctio
n
s
.
T
h
i
s
a
p
p
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a
c
h
w
il
l
n
o
t
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l
y
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ti
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co
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t
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ls
o
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q
u
i
p
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u
d
e
n
ts
f
o
r
a
d
v
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n
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d
s
t
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d
i
es
in
m
a
t
h
e
m
a
t
i
cs
a
n
d
r
e
l
at
e
d
d
i
s
ci
p
l
i
n
e
s
[
5
3
]
.
4
.
4
.
F
uture
re
s
ea
rc
h direc
t
i
o
ns
Giv
en
th
e
o
n
g
o
in
g
is
s
u
es
in
f
r
ac
tio
n
co
m
p
r
e
h
en
s
io
n
,
o
n
g
o
in
g
r
esear
ch
in
to
ef
f
ec
tiv
e
teac
h
in
g
m
eth
o
d
o
l
o
g
ies
is
im
p
er
ativ
e
.
As
th
e
c
o
m
p
lex
ities
o
f
f
r
ac
tio
n
co
m
p
r
eh
e
n
s
io
n
c
o
n
tin
u
e
to
c
h
allen
g
e
b
o
th
ed
u
ca
to
r
s
an
d
s
tu
d
e
n
ts
,
th
er
e
is
a
p
r
ess
in
g
n
ee
d
f
o
r
f
u
r
th
er
r
esear
ch
in
to
in
n
o
v
ativ
e
an
d
s
u
s
tain
ab
le
s
tr
ateg
ies
f
o
r
f
r
ac
tio
n
in
s
tr
u
ctio
n
.
Desp
ite
n
o
tab
le
a
d
v
an
ce
m
en
ts
in
p
in
p
o
in
tin
g
s
u
cc
ess
f
u
l
p
ed
ag
o
g
ical
tech
n
i
q
u
es,
th
er
e
’
s
a
v
ast
o
p
p
o
r
t
u
n
ity
to
en
h
an
ce
lear
n
i
n
g
o
u
tco
m
es
in
f
r
ac
tio
n
ed
u
ca
tio
n
th
r
o
u
g
h
in
n
o
v
ativ
e
teac
h
in
g
m
eth
o
d
s
an
d
co
m
p
r
eh
en
s
iv
e
e
d
u
ca
tio
n
al
r
e
f
o
r
m
s
.
A
c
r
i
t
i
c
al
ar
ea
f
o
r
f
u
tu
r
e
ex
p
l
o
r
atio
n
is
th
e
c
r
ea
tio
n
o
f
teac
h
i
n
g
s
tr
ateg
ies
th
at
f
a
v
o
r
d
ee
p
c
o
n
ce
p
tu
al
u
n
d
er
s
tan
d
i
n
g
r
ath
er
th
an
ju
s
t
p
r
o
ce
d
u
r
al
k
n
o
wled
g
e.
R
esear
ch
h
a
s
s
h
o
w
n
t
h
e
b
e
n
e
f
i
t
s
o
f
e
m
p
l
o
y
i
n
g
m
an
ip
u
lativ
es
an
d
v
is
u
al
aid
s
in
clo
s
in
g
th
e
co
m
p
r
eh
en
s
io
n
g
ap
s
am
o
n
g
s
tu
d
en
ts
[
3
2
]
,
[
3
9
]
.
H
o
w
e
v
e
r
,
d
e
e
p
e
r
in
v
esti
g
atio
n
s
ar
e
r
e
q
u
ir
ed
to
ass
es
s
h
o
w
th
ese
m
eth
o
d
s
af
f
ec
t
lo
n
g
-
ter
m
r
eten
tio
n
an
d
m
aster
y
o
f
f
r
ac
tio
n
s
.
Fo
r
ex
am
p
le,
Naid
o
o
an
d
H
a
j
a
r
e
e
[
5
4
]
n
o
t
e
d
t
h
a
t
w
h
i
l
e
v
i
r
t
u
a
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m
p
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k
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l
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y
et
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b
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f
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ll
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m
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m
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y
o
f
f
r
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c
t
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n
s
[
4
1
]
.
F
u
t
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r
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s
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A
d
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p
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.
A
c
co
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o
F
l
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r
e
s
-
V
e
l
az
q
u
e
z
e
t
a
l
.
[
5
5
]
,
t
h
e
s
u
cc
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s
s
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s
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m
a
n
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p
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v
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
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2
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J
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Vo
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14
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3
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J
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20
25
:
2
1
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7
-
2
1
1
7
2112
d
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ely
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e
x
p
e
r
i
e
n
c
e
s
i
n
f
r
a
c
ti
o
n
s
[
5
6
]
.
M
o
r
e
o
v
e
r
,
t
a
il
o
r
i
n
g
t
h
e
s
e
p
r
o
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r
a
m
s
f
o
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t
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ac
h
e
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s
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n
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c
o
n
o
m
i
c
a
l
l
y
d
is
a
d
v
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n
t
a
g
e
d
a
r
e
a
s
,
w
h
e
r
e
ac
c
es
s
t
o
s
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p
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i
s
t
i
c
ate
d
t
o
o
l
s
m
i
g
h
t
b
e
l
i
m
i
te
d
,
i
s
c
r
u
c
i
a
l
.
W
h
en
it
co
m
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to
ass
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m
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t,
cu
r
r
e
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m
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h
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o
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ten
f
all
s
h
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ca
p
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u
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in
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s
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c
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p
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tan
d
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f
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en
s
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d
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s
tu
d
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h
a
v
e
o
f
f
r
ac
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c
o
n
ce
p
ts
[
5
7
]
.
Fu
t
u
r
e
r
esear
ch
s
h
o
u
ld
aim
at
d
ev
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lo
p
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tech
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task
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o
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-
life
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th
at
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eq
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ir
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tu
d
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to
ar
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t
p
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s
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d
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s
ta
n
d
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o
f
f
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ac
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n
s
in
d
if
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t
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itu
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s
.
Su
ch
ass
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m
en
ts
co
u
ld
p
r
o
v
id
e
a
d
e
ep
er
in
s
ig
h
t
in
to
s
tu
d
en
t
ca
p
ab
ilit
ies,
lead
in
g
to
m
o
r
e
p
r
ec
is
e
teac
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in
g
in
ter
v
e
n
tio
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s
.
Fu
r
th
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m
o
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e
,
th
er
e
is
a
n
ee
d
f
o
r
lo
n
g
itu
d
in
al
s
tu
d
ies
th
at
f
o
llo
w
th
e
p
r
o
g
r
ess
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n
o
f
s
tu
d
en
ts
’
u
n
d
er
s
tan
d
i
n
g
o
f
f
r
ac
tio
n
s
f
r
o
m
elem
en
tar
y
th
r
o
u
g
h
s
ec
o
n
d
ar
y
ed
u
ca
tio
n
.
As
T
ian
an
d
S
ieg
ler
[
5
2
]
p
o
in
ted
o
u
t,
wh
ile
m
an
y
in
ter
v
e
n
tio
n
s
s
h
o
w
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u
ick
im
p
r
o
v
em
e
n
ts
in
u
n
d
er
s
tan
d
in
g
f
r
ac
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s
,
th
e
lo
n
g
-
ter
m
s
u
s
tain
ab
ilit
y
o
f
th
ese
im
p
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o
v
em
en
ts
is
o
f
ten
n
o
t
ex
am
i
n
ed
.
L
o
n
g
itu
d
in
al
r
esear
ch
c
o
u
ld
illu
m
in
ate
th
e
o
p
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tim
in
g
s
a
n
d
m
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o
d
s
f
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in
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v
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in
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s
tr
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f
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last
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g
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m
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ac
t
o
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s
tu
d
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ts
’
m
ath
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atica
l
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wth
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s
s
u
c
h
a
s
t
h
e
u
s
e
o
f
n
u
m
b
e
r
l
i
n
e
s
o
r
m
a
n
i
p
u
l
a
ti
v
e
s
a
r
e
m
o
s
t
e
f
f
e
ct
i
v
e
f
o
r
d
i
f
f
e
r
e
n
t
a
g
e
g
r
o
u
p
s
[
4
2
]
.
L
astl
y
,
th
e
ef
f
ec
t
o
f
cu
ltu
r
al
a
n
d
co
n
te
x
tu
al
f
ac
to
r
s
o
n
f
r
ac
ti
o
n
lear
n
in
g
is
an
ar
ea
th
at
war
r
an
ts
m
o
r
e
atten
tio
n
.
Stu
d
ies
h
av
e
in
d
ic
ated
th
at
s
tu
d
en
ts
f
r
o
m
d
if
f
er
en
t
cu
ltu
r
al
b
ac
k
g
r
o
u
n
d
s
m
ay
em
p
l
o
y
v
ar
ied
ap
p
r
o
ac
h
es
to
s
o
lv
in
g
f
r
ac
tio
n
p
r
o
b
lem
s
,
in
f
lu
en
ce
d
b
y
th
eir
p
r
io
r
m
ath
e
m
atica
l
ex
p
er
i
en
ce
s
an
d
n
u
m
b
e
r
s
y
s
tem
s
[
2
6
]
.
I
n
v
esti
g
atin
g
h
o
w
teac
h
in
g
s
tr
ateg
ies ca
n
b
e
ad
ap
ted
to
b
e
cu
ltu
r
ally
r
esp
o
n
s
iv
e
an
d
s
u
p
p
o
r
t th
e
u
n
iq
u
e
lear
n
in
g
n
ee
d
s
o
f
s
tu
d
en
ts
is
ess
en
tial.
T
h
is
r
esea
r
ch
co
u
l
d
lead
to
t
h
e
d
ev
el
o
p
m
en
t
o
f
teac
h
in
g
p
r
ac
tices th
at
r
esp
ec
t th
e
d
iv
e
r
s
e
ed
u
ca
tio
n
al
b
ac
k
g
r
o
u
n
d
s
o
f
s
tu
d
en
ts
lear
n
in
g
f
r
ac
tio
n
s
.
I
n
s
u
m
m
a
r
y
,
ad
v
a
n
cin
g
o
u
r
u
n
d
er
s
tan
d
in
g
o
f
f
r
ac
tio
n
teac
h
in
g
r
e
q
u
ir
es
a
m
u
ltid
im
en
s
io
n
al
r
esear
ch
ap
p
r
o
ac
h
,
f
o
cu
s
in
g
o
n
teac
h
i
n
g
m
et
h
o
d
o
lo
g
ies,
p
r
o
f
ess
io
n
al
d
ev
elo
p
m
en
t,
ass
ess
m
en
t
tech
n
iq
u
es
a
n
d
th
e
in
f
lu
en
ce
o
f
c
u
ltu
r
e
o
n
lear
n
in
g
.
Su
ch
an
ap
p
r
o
ac
h
ca
n
p
r
o
v
id
e
d
ee
p
er
in
s
ig
h
ts
in
to
h
o
w
s
tu
d
en
ts
f
r
o
m
d
if
f
er
en
t
b
ac
k
g
r
o
u
n
d
s
g
r
asp
f
r
ac
tio
n
co
n
ce
p
ts
,
allo
win
g
ed
u
ca
to
r
s
to
tailo
r
th
eir
s
tr
ateg
ies
ac
co
r
d
in
g
l
y
.
T
h
ese
r
esear
ch
p
ath
s
p
r
o
m
is
e
to
r
ef
i
n
e
ed
u
ca
tio
n
al
p
r
ac
tices,
m
ak
i
n
g
f
r
ac
tio
n
lear
n
in
g
m
o
r
e
e
q
u
i
tab
le,
in
clu
s
iv
e
a
n
d
ef
f
ec
tiv
e,
th
er
e
b
y
b
etter
p
r
e
p
a
r
in
g
s
tu
d
en
ts
f
o
r
s
u
cc
ess
in
m
ath
em
atics a
n
d
r
elate
d
STE
M
f
ield
s
.
5.
RE
CO
M
M
E
NDA
T
I
O
N
B
ased
o
n
th
e
im
p
licatio
n
s
d
is
cu
s
s
ed
,
th
e
f
o
llo
win
g
r
ec
o
m
m
en
d
atio
n
s
ar
e
p
r
o
p
o
s
ed
t
o
im
p
r
o
v
e
f
r
ac
tio
n
co
m
p
r
eh
e
n
s
io
n
am
o
n
g
s
tu
d
en
ts
,
en
h
a
n
ce
ed
u
ca
tio
n
al
p
r
ac
tices
an
d
s
h
ap
e
p
o
licy
d
ev
elo
p
m
e
n
t.
T
h
ese
r
ec
o
m
m
en
d
atio
n
s
f
o
cu
s
o
n
i
n
s
tr
u
ctio
n
al
s
tr
ateg
ies,
cu
r
r
icu
lu
m
im
p
r
o
v
em
en
ts
,
teac
h
er
d
ev
elo
p
m
en
t
an
d
f
u
r
th
er
r
esear
c
h
to
ad
d
r
ess
co
m
m
o
n
ch
allen
g
es
in
f
r
ac
tio
n
lear
n
in
g
.
B
y
im
p
lem
en
tin
g
th
ese
ev
id
en
ce
-
b
ased
ap
p
r
o
ac
h
es,
ed
u
ca
to
r
s
an
d
p
o
licy
m
ak
er
s
ca
n
cr
ea
te
m
o
r
e
ef
f
ec
tiv
e
an
d
en
g
a
g
in
g
f
r
ac
tio
n
in
s
tr
u
ctio
n
th
a
t
s
u
p
p
o
r
ts
lo
n
g
-
ter
m
s
tu
d
e
n
t su
cc
ess
.
5
.
1
.
E
m
ph
a
s
ize
co
ncept
ua
l und
er
s
t
a
n
din
g
in t
ea
ching
f
ra
ct
io
ns
C
o
n
s
id
er
in
g
th
e
co
m
m
o
n
ch
al
len
g
es
f
ac
ed
b
y
s
tu
d
en
ts
i
n
m
aster
in
g
f
r
ac
tio
n
s
,
it
is
v
ital
f
o
r
ed
u
c
ato
r
s
to
tr
an
s
itio
n
th
eir
em
p
h
asis
f
r
o
m
m
er
e
p
r
o
ce
d
u
r
al
f
l
u
en
cy
t
o
co
n
ce
p
tu
al
u
n
d
er
s
tan
d
i
n
g
.
R
esear
ch
s
h
o
ws
th
at
s
tu
d
en
ts
o
f
ten
r
ely
h
ea
v
ily
o
n
m
em
o
r
izatio
n
a
n
d
p
r
o
ce
d
u
r
es,
wh
ich
lim
it
th
eir
ab
ilit
y
to
ap
p
ly
f
r
ac
tio
n
co
n
ce
p
ts
in
n
o
v
el
c
o
n
tex
ts
[
4
0
]
.
T
r
a
d
itio
n
al
teac
h
in
g
m
eth
o
d
s
,
wh
ich
p
r
io
r
itize
m
e
m
o
r
iz
atio
n
an
d
r
ep
etitiv
e
ex
er
cises
,
ar
e
in
s
u
f
f
icien
t
f
o
r
f
o
s
ter
in
g
a
d
ee
p
u
n
d
e
r
s
tan
d
in
g
o
f
f
r
ac
tio
n
s
.
I
n
s
tead
,
i
n
co
r
p
o
r
atin
g
v
is
u
al
aid
s
s
u
ch
as
ar
ea
m
o
d
els,
n
u
m
b
e
r
lin
es
an
d
s
et
m
o
d
els
s
ig
n
i
f
ican
tly
aid
s
in
h
elp
in
g
s
tu
d
en
ts
co
n
ce
p
tu
alize
f
r
ac
tio
n
s
an
d
u
n
d
er
s
tan
d
th
ei
r
p
r
o
p
er
ties
[
3
0
]
.
T
h
ese
aid
s
b
ec
o
m
e
esp
ec
ially
p
o
wer
f
u
l
wh
en
p
air
ed
with
tan
g
ib
le
ac
tiv
ities
,
en
ab
lin
g
s
t
u
d
en
ts
to
en
g
ag
e
d
ir
ec
tly
with
f
r
ac
tio
n
s
,
th
u
s
f
o
r
tify
i
n
g
th
eir
co
n
ce
p
tu
al
g
r
asp
.
T
h
ese
aid
s
,
wh
e
n
p
air
ed
with
tan
g
ib
le
ac
tiv
ities
,
h
el
p
s
tu
d
e
n
ts
d
ir
ec
tly
en
g
a
g
e
with
f
r
ac
ti
o
n
s
,
f
o
r
tify
in
g
th
ei
r
co
n
ce
p
tu
al
g
r
asp
[
3
2
]
.
Su
c
h
p
ed
a
g
o
g
ical
a
p
p
r
o
ac
h
es
s
h
o
u
ld
b
e
ce
n
tr
al
to
f
r
ac
tio
n
in
s
tr
u
ctio
n
to
en
s
u
r
e
s
tu
d
en
ts
b
u
ild
a
r
o
b
u
s
t
f
o
u
n
d
a
tio
n
in
u
n
d
er
s
tan
d
in
g
f
r
ac
tio
n
s
.
Ad
d
itio
n
ally
,
f
r
ac
tio
n
in
s
tr
u
c
tio
n
m
u
s
t
f
o
cu
s
o
n
h
elp
in
g
s
tu
d
en
ts
tr
an
s
itio
n
f
r
o
m
u
s
in
g
m
an
ip
u
lativ
es
to
ab
s
tr
ac
t
r
ea
s
o
n
in
g
.
T
h
is
ap
p
r
o
ac
h
en
s
u
r
es
th
a
t
s
tu
d
en
ts
n
o
t o
n
ly
u
n
d
er
s
tan
d
f
r
ac
tio
n
o
p
e
r
atio
n
s
b
u
t a
ls
o
r
etain
th
eir
co
n
ce
p
tu
al
k
n
o
wled
g
e
o
v
er
tim
e
[
4
4
]
.
5
.
2
.
I
nte
g
ra
t
e
t
ec
hn
o
lo
g
y
int
o
f
ra
ct
i
o
n ins
t
ruct
io
n
T
ec
h
n
o
lo
g
y
’
s
r
o
le
in
e
n
r
ich
i
n
g
f
r
ac
tio
n
in
s
tr
u
ctio
n
h
as
b
e
en
well
-
d
o
cu
m
en
ted
.
I
t
is
ad
v
is
ab
le
f
o
r
teac
h
er
s
to
in
teg
r
ate
d
ig
ital
t
o
o
ls
an
d
in
ter
ac
tiv
e
s
o
f
twar
e
i
n
to
th
eir
f
r
ac
tio
n
less
o
n
s
.
Stu
d
i
es
h
av
e
s
h
o
wn
th
at
o
n
lin
e
m
an
ip
u
lativ
es,
ed
u
ca
tio
n
al
ap
p
s
an
d
s
m
ar
t
b
o
ar
d
s
p
r
o
v
id
e
v
ib
r
an
t
an
d
en
g
ag
i
n
g
r
ep
r
esen
tatio
n
s
o
f
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t
J
E
v
al
&
R
es E
d
u
c
I
SS
N:
2252
-
8
8
2
2
A
d
d
r
ess
in
g
fr
a
ctio
n
co
mp
r
eh
e
n
s
io
n
:
g
lo
b
a
l p
ers
p
ec
tives a
n
d
Ma
la
ysia
n
…
(
S
ye
d
A
z
ma
n
S
y
ed
I
s
ma
il
)
2113
f
r
ac
tio
n
s
,
allo
win
g
s
tu
d
en
ts
t
o
ex
p
lo
r
e
a
n
d
i
n
ter
ac
t
with
f
r
ac
tio
n
co
n
ce
p
ts
in
a
d
y
n
am
ic
an
d
s
af
e
e
n
v
ir
o
n
m
en
t
[
5
4
]
,
[
5
5
]
.
T
h
ese
to
o
ls
also
h
elp
p
er
s
o
n
alize
th
e
lear
n
in
g
ex
p
er
ien
ce
b
y
o
f
f
er
i
n
g
d
if
f
e
r
en
tiated
in
s
tr
u
ctio
n
b
ased
o
n
in
d
iv
i
d
u
al
s
tu
d
en
t
n
ee
d
s
[
4
1
]
.
T
ec
h
n
o
lo
g
y
also
p
r
o
v
id
es
in
s
tan
t
f
ee
d
b
ac
k
an
d
d
iv
e
r
s
e
r
ep
r
esen
tatio
n
s
,
wh
ich
ar
e
ess
en
tial
f
o
r
r
ein
f
o
r
cin
g
s
tu
d
en
ts
’
co
n
ce
p
tu
al
u
n
d
e
r
s
tan
d
in
g
.
Mo
r
eo
v
er
,
u
s
in
g
tech
n
o
lo
g
y
allo
ws
f
o
r
th
e
p
er
s
o
n
aliza
tio
n
o
f
lear
n
in
g
e
x
p
er
ien
ce
s
,
wh
ich
ca
n
b
e
esp
ec
ially
b
en
ef
icial
in
m
ee
tin
g
th
e
v
ar
ied
n
ee
d
s
o
f
s
t
u
d
en
ts
[
4
4
]
.
Fu
tu
r
e
r
esear
ch
s
h
o
u
ld
f
o
cu
s
o
n
h
o
w
b
est
to
in
teg
r
ate
th
ese
to
o
ls
in
to
r
eg
u
la
r
class
r
o
o
m
p
r
ac
tices,
esp
ec
ially
in
u
n
d
er
-
r
eso
u
r
c
ed
en
v
ir
o
n
m
en
ts
[
3
9
]
.
5
.
3
.
P
r
o
v
ide o
ng
o
ing
pro
f
ess
io
na
l dev
elo
pm
ent
f
o
r
t
ea
ch
er
s
Fo
r
th
ese
ad
v
an
ce
d
teac
h
in
g
s
tr
ateg
ies
to
b
e
im
p
lem
en
ted
ef
f
ec
tiv
ely
,
ed
u
ca
to
r
s
m
u
s
t
r
ec
eiv
e
co
n
tin
u
o
u
s
p
r
o
f
ess
io
n
al
d
ev
el
o
p
m
en
t.
R
ec
en
t
r
esear
ch
em
p
h
asizes
th
at
wh
ile
to
o
ls
lik
e
m
an
ip
u
lativ
es
an
d
d
ig
ital
tech
n
o
lo
g
y
ar
e
p
o
wer
f
u
l,
th
eir
im
p
ac
t
lar
g
ely
d
ep
e
n
d
s
o
n
th
e
teac
h
er
’
s
ab
ilit
y
to
u
s
e
th
em
ef
f
ec
tiv
ely
in
th
e
class
r
o
o
m
[
5
5
]
.
Pro
f
ess
io
n
al
d
ev
elo
p
m
en
t
in
itiativ
es
s
h
o
u
ld
f
o
c
u
s
o
n
eq
u
ip
p
in
g
teac
h
er
s
with
b
o
th
th
e
p
ed
ag
o
g
ical
k
n
o
wled
g
e
an
d
p
r
ac
tical
s
tr
ateg
ies
n
ee
d
ed
to
f
o
s
ter
m
ea
n
in
g
f
u
l
f
r
ac
tio
n
lear
n
in
g
ex
p
e
r
ien
ce
s
.
I
m
p
o
r
ta
n
tly
,
s
u
ch
p
r
o
g
r
a
m
s
s
h
o
u
ld
b
e
a
d
ap
ted
to
t
h
e
n
ee
d
s
o
f
teac
h
er
s
in
lo
w
-
r
eso
u
r
ce
s
ettin
g
s
,
wh
er
e
ac
ce
s
s
to
ad
v
an
ce
d
to
o
ls
m
ay
b
e
lim
ited
[
1
7
]
.
T
r
ai
n
in
g
s
h
o
u
l
d
also
en
co
u
r
ag
e
co
llab
o
r
atio
n
am
o
n
g
ed
u
ca
t
o
r
s
,
p
r
o
m
o
tin
g
th
e
ex
c
h
an
g
e
o
f
e
f
f
ec
tiv
e
p
r
ac
tices
an
d
f
o
s
ter
in
g
r
ef
lectiv
e
teac
h
i
n
g
.
Fu
r
t
h
e
r
m
o
r
e,
p
r
o
f
ess
io
n
al
d
ev
elo
p
m
e
n
t
p
r
o
g
r
am
s
s
h
o
u
ld
f
o
cu
s
o
n
b
u
ild
in
g
teac
h
er
s
’
ca
p
ac
ity
to
ef
f
ec
tiv
ely
co
m
b
in
e
co
n
c
r
ete
m
an
ip
u
lativ
es
with
v
ir
tu
al
lear
n
in
g
to
o
ls
,
cr
ea
tin
g
a
b
len
d
e
d
lear
n
in
g
en
v
ir
o
n
m
e
n
t
[
4
0
]
.
Stu
d
ies
s
u
g
g
est
th
at
p
r
o
f
ess
io
n
al
d
ev
elo
p
m
en
t
th
a
t
is
s
u
s
tain
ed
o
v
e
r
tim
e
an
d
in
teg
r
ated
in
to
teac
h
er
s
’
p
r
a
ctice
h
as
a
g
r
ea
te
r
lik
elih
o
o
d
o
f
im
p
r
o
v
in
g
s
tu
d
e
n
t o
u
tco
m
es [
5
8
]
.
5
.
4
.
Rev
is
e
curr
iculu
m
a
nd
dev
elo
p a
s
s
ess
m
ent
s
t
o
ens
u
re
co
ncept
ua
l und
er
s
t
a
n
din
g
C
u
r
r
icu
lu
m
d
e
v
elo
p
e
r
s
ar
e
en
co
u
r
ag
e
d
to
u
p
d
ate
m
ath
em
ati
cs
p
r
o
g
r
a
m
s
to
p
r
esen
t
f
r
ac
tio
n
s
n
o
t
ju
s
t
as
th
eo
r
etica
l
co
n
ce
p
ts
b
u
t
also
as
f
u
n
ctio
n
al
to
o
ls
f
o
r
ad
d
r
e
s
s
in
g
r
ea
l
-
life
ch
allen
g
es.
I
n
tr
o
d
u
cin
g
s
tu
d
en
ts
to
p
r
ac
tical
ap
p
licatio
n
s
an
d
ex
am
p
les
o
f
f
r
ac
tio
n
s
ca
n
m
ak
e
lear
n
in
g
m
o
r
e
ta
n
g
ib
le
an
d
in
tr
ig
u
i
n
g
,
h
elp
in
g
th
em
r
ec
o
g
n
ize
th
e
p
r
ac
ticalit
y
o
f
th
eir
less
o
n
s
[
2
8
]
,
[
5
3
]
.
A
c
t
i
v
it
i
es
s
u
c
h
a
s
ca
l
c
u
l
at
i
n
g
r
e
c
i
p
e
i
n
g
r
e
d
i
e
n
ts
,
d
i
v
i
d
i
n
g
r
e
s
o
u
r
c
es
i
n
c
o
n
s
t
r
u
c
ti
o
n
p
r
o
j
e
c
ts
o
r
i
n
t
e
r
p
r
e
t
i
n
g
s
cie
n
t
i
f
i
c
d
a
t
a
c
a
n
b
r
i
d
g
e
f
r
a
c
t
i
o
n
s
t
o
d
a
i
l
y
s
ce
n
a
r
i
o
s
,
a
s
s
i
s
t
i
n
g
s
t
u
d
e
n
ts
i
n
b
u
i
l
d
i
n
g
a
p
r
o
f
o
u
n
d
,
a
p
p
l
i
c
a
b
l
e
u
n
d
e
r
s
t
a
n
d
i
n
g
o
f
f
r
a
c
t
i
o
n
s
.
T
h
i
s
a
p
p
r
o
a
c
h
n
o
t
o
n
l
y
m
a
k
e
s
t
h
e
l
e
a
r
n
i
n
g
p
r
o
c
e
s
s
m
o
r
e
r
e
l
ata
b
l
e
b
u
t
a
ls
o
s
t
r
e
n
g
t
h
e
n
s
s
t
u
d
en
t
s
’
f
u
n
d
a
m
e
n
t
a
l
g
r
as
p
o
f
f
r
a
c
ti
o
n
c
o
n
c
e
p
t
s
.
I
n
ad
d
itio
n
to
c
u
r
r
icu
l
u
m
r
e
v
is
io
n
s
,
ass
es
s
m
en
ts
s
h
o
u
ld
b
e
alig
n
ed
with
th
ese
p
r
ac
tical
ap
p
licatio
n
s
an
d
f
o
c
u
s
o
n
e
v
alu
atin
g
s
tu
d
e
n
ts
’
co
n
ce
p
tu
al
u
n
d
e
r
s
tan
d
in
g
r
ath
er
th
an
s
im
p
l
y
th
eir
p
r
o
ce
d
u
r
al
s
k
ills
.
C
u
r
r
en
t
ass
es
s
m
en
t
m
eth
o
d
s
,
w
h
ich
te
n
d
to
f
o
c
u
s
o
n
p
r
o
ce
d
u
r
al
k
n
o
wled
g
e,
m
ig
h
t
n
o
t
ad
e
q
u
ately
r
ef
lect
a
s
tu
d
en
t
’
s
g
r
asp
o
f
f
r
ac
tio
n
s
[
5
7
]
.
As s
u
ch
,
ed
u
ca
tio
n
al
au
th
o
r
ities
ar
e
en
co
u
r
a
g
ed
to
d
ev
el
o
p
an
d
im
p
lem
en
t a
s
s
es
s
m
en
t
to
o
ls
th
at
m
ea
s
u
r
e
s
tu
d
en
ts
’
ab
ilit
y
to
ap
p
ly
f
r
ac
tio
n
s
in
r
ea
l
-
wo
r
ld
s
itu
atio
n
s
an
d
ex
p
l
ain
th
eir
r
ea
s
o
n
in
g
.
I
n
co
r
p
o
r
atin
g
task
s
th
at
r
eq
u
ir
e
p
r
o
b
lem
-
s
o
lv
in
g
i
n
p
r
ac
ti
ca
l
co
n
tex
ts
co
u
ld
o
f
f
er
d
ee
p
er
in
s
ig
h
ts
in
to
a
s
tu
d
en
t
’
s
co
m
p
r
eh
en
s
io
n
an
d
en
a
b
le
m
o
r
e
tar
g
eted
e
d
u
ca
tio
n
al
in
ter
v
en
tio
n
s
[
3
9
]
.
Ass
ess
m
en
ts
th
at
ch
allen
g
e
s
tu
d
e
n
ts
to
th
i
n
k
c
r
itically
an
d
d
em
o
n
s
tr
ate
t
h
e
a
p
p
licatio
n
o
f
f
r
ac
tio
n
s
in
p
r
ac
tical
s
ce
n
ar
io
s
will
h
elp
cu
ltiv
ate
a
d
ee
p
er
a
n
d
m
o
r
e
en
d
u
r
in
g
u
n
d
e
r
s
tan
d
in
g
o
f
t
h
e
to
p
ic.
5
.
5
.
Co
nd
uct
f
urt
her
re
s
ea
r
ch
o
n e
f
f
ec
t
iv
e
f
r
a
ct
io
n ins
t
ruct
io
n
On
g
o
in
g
r
esear
ch
is
p
i
v
o
tal
i
n
d
is
co
v
er
i
n
g
a
n
d
r
e
f
in
in
g
th
e
m
o
s
t
ef
f
ec
tiv
e
m
eth
o
d
s
f
o
r
teac
h
in
g
f
r
ac
tio
n
.
Stu
d
ies
s
h
o
u
l
d
f
o
cu
s
o
n
h
o
w
teac
h
in
g
p
r
ac
tices,
tech
n
o
l
o
g
ical
to
o
ls
an
d
cu
r
r
icu
lu
m
ad
j
u
s
tm
en
ts
af
f
ec
t
lo
n
g
-
ter
m
s
tu
d
e
n
t
o
u
tco
m
es
in
f
r
ac
tio
n
co
m
p
r
eh
e
n
s
io
n
[
5
9
]
.
Fu
r
th
er
m
o
r
e,
r
esear
c
h
s
h
o
u
ld
ex
p
lo
r
e
h
o
w
f
r
ac
tio
n
i
n
s
tr
u
ctio
n
ca
n
b
e
ta
ilo
r
ed
to
m
ee
t
th
e
n
ee
d
s
o
f
d
iv
er
s
e
s
tu
d
en
t
p
o
p
u
latio
n
s
,
in
clu
d
in
g
th
o
s
e
in
lo
w
-
r
eso
u
r
ce
o
r
h
i
g
h
-
n
ee
d
s
en
v
ir
o
n
m
e
n
ts
[
4
4
]
.
Par
ticu
lar
ly
,
r
esear
ch
s
h
o
u
ld
f
o
c
u
s
o
n
ex
a
m
in
in
g
h
o
w
cu
ltu
r
al
d
if
f
er
en
ce
s
in
f
lu
en
ce
s
tu
d
en
ts
’
f
r
ac
tio
n
co
m
p
r
eh
e
n
s
io
n
a
n
d
id
en
tify
in
g
s
tr
ateg
ies
th
at
ca
n
b
e
ad
ap
te
d
to
lo
ca
l
co
n
tex
ts
[
4
1
]
.
L
o
n
g
itu
d
in
al
s
tu
d
ies
ar
e
p
ar
ticu
lar
ly
im
p
o
r
t
an
t
in
ass
ess
in
g
th
e
lo
n
g
-
ter
m
im
p
ac
t
o
f
th
ese
in
s
tr
u
ctio
n
al
in
ter
v
e
n
tio
n
s
an
d
h
o
w
th
ey
a
f
f
ec
t
s
tu
d
e
n
ts
’
m
ath
em
atica
l
d
ev
elo
p
m
en
t
f
r
o
m
p
r
im
a
r
y
t
h
r
o
u
g
h
s
ec
o
n
d
ar
y
ed
u
ca
tio
n
[
6
0
]
.
R
esear
ch
co
u
ld
also
in
v
esti
g
ate
th
e
r
o
le
o
f
teac
h
er
p
r
o
f
ess
io
n
al
d
ev
elo
p
m
en
t
in
en
h
an
cin
g
th
e
ef
f
ec
tiv
en
ess
o
f
f
r
ac
tio
n
i
n
s
tr
u
ctio
n
ac
r
o
s
s
d
if
f
er
en
t
ed
u
ca
tio
n
al
s
ettin
g
s
,
en
s
u
r
in
g
eq
u
itab
le
ac
ce
s
s
to
q
u
ality
ed
u
ca
tio
n
.
T
h
ese
r
ec
o
m
m
e
n
d
atio
n
s
,
w
h
en
im
p
lem
en
te
d
,
ar
e
ex
p
e
cted
to
s
ig
n
if
ica
n
tly
en
h
an
ce
s
tu
d
en
ts
’
u
n
d
er
s
tan
d
i
n
g
o
f
f
r
ac
tio
n
s
an
d
im
p
r
o
v
e
ed
u
ca
tio
n
al
o
u
tco
m
es.
T
h
e
co
n
ce
p
tu
al
f
r
a
m
ewo
r
k
p
r
esen
ted
in
t
h
is
p
ap
er
o
f
f
er
s
s
u
b
s
tan
tial
p
r
ac
tical,
th
eo
r
etica
l
an
d
m
eth
o
d
o
lo
g
ical
co
n
tr
ib
u
tio
n
s
to
th
e
f
ield
o
f
f
r
ac
tio
n
ed
u
ca
tio
n
.
O
n
a
p
r
ac
tical
lev
e
l,
it
p
r
o
v
id
es
e
d
u
ca
to
r
s
an
d
p
o
licy
m
ak
er
s
with
ac
tio
n
ab
le
s
tr
ateg
ies
s
u
ch
as
th
e
in
teg
r
atio
n
o
f
m
a
n
ip
u
lativ
es,
tech
n
o
lo
g
y
a
n
d
tar
g
eted
p
r
o
f
ess
io
n
al
d
ev
elo
p
m
e
n
t,
all
aim
ed
at
im
p
r
o
v
in
g
s
tu
d
en
ts
’
co
n
ce
p
tu
al
g
r
asp
o
f
f
r
ac
tio
n
s
.
T
h
ese
s
tr
ateg
ies,
d
r
awn
f
r
o
m
g
lo
b
al
b
est
p
r
ac
tic
es,
ca
n
b
e
ad
ap
te
d
ac
r
o
s
s
d
iv
er
s
e
ed
u
ca
tio
n
al
s
ett
in
g
s
to
s
tr
en
g
th
en
cu
r
r
ic
u
lu
m
d
esig
n
an
d
i
n
s
tr
u
ctio
n
al
ap
p
r
o
ac
h
es.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8
8
2
2
I
n
t
J
E
v
al
&
R
es E
d
u
c
,
Vo
l
.
14
,
No
.
3
,
J
u
n
e
20
25
:
2
1
0
7
-
2
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ed
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ltu
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m
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ca
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[
1
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Z.
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