Skill updates

IXL is continually adding new skills and improving existing ones to offer fresh and exciting ways to learn. To accurately reflect the curriculum improvements, skill names and skill listings may be adjusted, but the permanent skill ID always stays the same. Use this page to discover new skills and find old favorites!

Math
Language arts
Science
Social studies
Spanish
Spanish language arts
Pre-K
Kindergarten
First
Second
Third
Fourth
Fifth
Sixth
Seventh
Eighth
Algebra 1
Geometry
Algebra 2
Precalculus
Calculus
Listing
Skill name and permanent skill ID
B.3
→
B.2
Put numbers up to 100 in order LK6
B.2
→
B.3
Comparing numbers up to 1,000 XF9
C.1
Skip-counting by twos
→
Skip-count by twos LK2
C.2
Skip-counting by fives
→
Skip-count by fives VHG
C.3
Skip-counting by tens
→
Skip-count by tens 5PY
C.4
Skip-counting by fives and tens
→
Skip-count by fives and tens FVF
C.5
Skip-counting by twos, fives, and tens
→
Skip-count by twos, fives, and tens CBC
C.
→
C.12
Count forward by fives, tens, and hundreds ET8
C.12
→
C.13
Count forward and backward by fives, tens, and hundreds R5A
C.13
→
C.14
Count forward and backward by twos, fives, tens, and hundreds HNG
D.
→
D.6
Writing numbers up to 1,000 in words 2R7
D.6
→
D.7
Roman numerals I, V, X MJE
E.
→
E.3
Addition sentences for even and odd numbers 7PR
E.3
→
E.4
Even or odd numbers on number lines S8E
E.4
→
E.5
Identify even and odd numbers - up to 100 RGJ
E.5
→
E.6
Select even and odd numbers - up to 100 JLX
E.7
Which even or odd number comes before or after? CJK
G.2
Add one-digit numbers
→
Add one-digit numbers - sums to 20 5C6
G.
→
G.3
Sort addition facts - sums to 20 5QV
G.3
→
G.4
Addition word problems - sums to 20 EN6
G.4
→
G.5
Addition sentences for word problems - sums to 20 VSF
G.5
→
G.6
Complete the addition sentence - sums to 20 MQX
G.6
→
G.7
Balance addition equations - sums to 20 6LC
G.7
→
G.8
Which addition sentence is true? - sums to 20 GMN
G.8
→
G.9
Add three one-digit numbers YCC
G.9
→
G.10
Addition word problems - three one-digit numbers VJ9
G.10
→
G.11
Add four or more one-digit numbers 77J
G.11
→
G.12
Addition word problems - four or more one-digit numbers 8NS
H.
→
H.6
Count on and use ten to subtract - up to 20 SKQ
H.6
→
H.7
Subtract zero or all ZG2
I.2
Subtract a one-digit number from a two-digit number up to 18
→
Subtract a one-digit number from a two-digit number up to 20 HSU
I.3
Subtraction word problems - up to 18
→
Subtraction word problems - up to 20 2FD
I.4
Subtraction sentences for word problems - up to 18
→
Subtraction sentences for word problems - up to 20 AZ8
I.5
Complete the subtraction sentence - up to 18
→
Complete the subtraction sentence - up to 20 QS5
I.6
Balance subtraction equations - up to 18
→
Balance subtraction equations - up to 20 HFK
I.7
Which subtraction sentence is true? - up to 18
→
Which subtraction sentence is true? - up to 20 UY2
K.2
Use models to solve addition and subtraction word problems - up to 20 FXU
K.2
→
K.3
Addition and subtraction word problems - up to 20 75R
K.4
Write number sentences for word problems - up to 20 GXX
K.
→
K.5
Match word problems to addition and subtraction sentences - up to 20 ZCU
K.3
→
K.6
Two-step addition and subtraction word problems - up to 20 H55
K.4
→
K.7
Solve word problems using guess-and-check - up to 20 SK5
L.16
Regroup hundreds, tens, and ones - ways to make a number F6P
L.16
→
L.17
Guess the number TKV
N.3
Add multiples of 10
→
Add a multiple of 10 to a two-digit number NPQ
N.
→
N.7
Add two-digit numbers vertically - sums to 100 LZJ
N.7
→
N.8
Addition word problems - up to two digits XAT
N.8
→
N.9
Ways to make a number using addition S5E
N.9
→
N.10
Complete the addition sentence - up to two digits CZK
N.10
→
N.11
Write the addition sentence - up to two digits 5FM
N.11
→
N.12
Balance addition equations - up to two digits NH7
N.12
→
N.13
Add two-digit numbers - sums to 200 GZY
N.13
→
N.14
Add two-digit numbers vertically - sums to 200 ELR
N.14
→
N.15
Add three numbers up to two digits each YTH
N.15
→
N.16
Addition word problems - three numbers up to two digits each 52T
N.16
→
N.17
Add four numbers up to two digits each DP6
N.17
→
N.18
Add three or four numbers vertically - up to two digits each UNB
N.18
→
N.19
Addition word problems - four numbers up to two digits each YSX
O.
→
O.4
Use number lines to subtract two-digit numbers BA7
O.4
→
O.5
Break apart a two-digit number to subtract 9WW
O.5
→
O.6
Use compensation to subtract on a number line - up to two digits NFC
O.6
→
O.7
Use compensation to subtract - up to two digits 6TE
O.
→
O.8
Count on to subtract two-digit numbers ZV7
O.7
→
O.9
Use models to subtract two-digit numbers - without regrouping SKW
O.8
→
O.10
Use models to subtract two-digit numbers - with regrouping EVB
O.
→
O.11
Use place value to subtract two-digit numbers - without regrouping 6C6
O.
→
O.12
Use place value to subtract two-digit numbers - with regrouping Y7U
P.4
Subtract multiples of 10
→
Subtract a multiple of 10 from a two-digit number 2Q6
Q.
→
Q.5
Relate addition and subtraction sentences - up to two digits 7NX
Q.
→
Q.6
Complete the addition or subtraction sentence - up to 100 MTW
Q.5
→
Q.7
Balance addition and subtraction equations - up to 100 KSG
Q.
→
Q.8
Which addition or subtraction equation is true? - up to 100 X2H
Q.6
→
Q.9
Write addition and subtraction sentences QPH
Q.7
→
Q.10
Inequalities with addition and subtraction - up to 100 PWY
R.1
Use models to solve addition and subtraction word problems - up to 100 KT7
R.1
→
R.2
Addition and subtraction word problems - up to 100 MEP
R.3
Match addition and subtraction word problems to equations - up to 100 VHC
R.2
→
R.4
Two-step addition and subtraction word problems - up to 100 7P8
S.
→
S.1
Use number lines to add three-digit numbers CVM
S.2
Break apart a three-digit number to add M7S
S.1
→
S.3
Use compensation to add - up to three digits 89B
S.2
→
S.4
Use models to add three-digit numbers - without regrouping Q7V
S.3
→
S.5
Use models to add three-digit numbers - with regrouping KUG
S.
→
S.6
Use expanded form to add three-digit numbers - without regrouping 2G7
S.
→
S.7
Use expanded form to add three-digit numbers - with regrouping U9X
S.8
Use expanded form to add three-digit numbers XTU
T.1
Add 10 or 100 to a three-digit number K8E
T.1
→
T.2
Add multiples of 100
→
Add a multiple of 100 to a three-digit number 85Z
T.2
→
T.3
Add multiples of 10 or 100
→
Add a multiple of 10 or 100 to a three-digit number RCJ
T.4
Addition with three-digit numbers - without regrouping Y2U
T.5
Addition with three-digit numbers - with regrouping 7G7
T.3
→
T.6
Addition with three-digit numbers ETW
T.4
→
T.7
Add three-digit numbers vertically 7DG
T.5
→
T.8
Addition word problems - up to three digits UV2
T.6
→
T.9
Complete the addition sentence - up to three digits R5W
T.7
→
T.10
Write the addition sentence - up to three digits PQT
T.
→
T.11
Addition up to three digits - fill in the missing digits 7AT
T.8
→
T.12
Balance addition equations - up to three digits 5U9
U.1
Use number lines to subtract three-digit numbers C75
U.2
Break apart a three-digit number to subtract CL8
U.1
→
U.3
Use compensation to subtract - up to three digits DMV
U.2
→
U.4
Use models to subtract from three-digit numbers - without regrouping 55T
U.3
→
U.5
Use models to subtract from three-digit numbers - with regrouping GHQ
U.6
Use expanded form to subtract three-digit numbers - without regrouping SXB
U.7
Use expanded form to subtract three-digit numbers - with regrouping R9F
U.8
Use expanded form to subtract three-digit numbers JBR
V.1
Subtract 10 or 100 from a three-digit number RXY
V.1
→
V.2
Subtract multiples of 100
→
Subtract a multiple of 100 from a three-digit number 2E2
V.2
→
V.3
Subtract multiples of 10 or 100
→
Subtract a multiple of 10 or 100 from a three-digit number VVM
V.3
→
V.4
Subtract across zeros 9G5
V.5
Subtract from three-digit numbers - without regrouping EFL
V.6
Subtract from three-digit numbers - with regrouping E8A
V.4
→
V.7
Subtract from three-digit numbers ZVR
V.5
→
V.8
Subtract from three-digit numbers vertically JRW
V.6
→
V.9
Subtraction word problems - up to three digits ZMA
V.7
→
V.10
Complete the subtraction sentence - up to three digits MDY
V.8
→
V.11
Write the subtraction sentence - up to three digits 5B3
V.9
→
V.12
Balance subtraction equations - up to three digits LSU
W.1
Break apart a three-digit number to add or subtract 36P
W.2
Use compensation to add or subtract - up to 1,000 6Z4
W.1
→
W.3
Add and subtract numbers up to 1,000 WXQ
W.2
→
W.4
Add and subtract with three-digit numbers vertically YZ2
W.3
→
W.5
Addition and subtraction word problems - up to 1,000 MJB
W.4
→
W.6
Solve inequalities using addition and subtraction shortcuts 87Q
X.
→
X.6
Solve word problems using repeated addition - sums to 25 Y8S
X.7
Write stories involving repeated addition - sums to 25 3C2
AA.3
Count money - groups of like coins 47N
AA.3
→
AA.4
Count money - pennies, nickels, and dimes only AVN
AA.4
→
AA.5
Count money up to $1 DGK
AA.5
→
AA.6
Equivalent amounts of money up to $1 MGA
AA.6
→
AA.7
Exchanging money - with pictures VZD
AA.7
→
AA.8
Exchanging money 29V
AA.8
→
AA.9
Exchanging money II FVT
AA.9
→
AA.10
Least number of coins QAP
AA.10
→
AA.11
Do you have enough money? - up to $1 F62
AA.11
→
AA.12
How much more to make a dollar? V9L
AA.12
→
AA.13
Correct amount of change LQ7
AA.13
→
AA.14
Making change LYP
CC.4
Count money up to $100 - bills YPH
CC.5
Count money up to $100 3T6
DD.9
→
DD.8
Relate time units UAS
DD.8
→
EE.4
Number of days in each month VSR
FF.10
→
FF.3
Create picture graphs NM5
FF.9
→
FF.4
Interpret picture graphs QDT
FF.5
Record data in tables 89J
FF.6
Interpret data in tables PBZ
FF.6
→
FF.7
Create bar graphs 6KD
FF.3
→
FF.8
Interpret bar graphs I RPD
FF.4
→
FF.9
Interpret bar graphs II 8CH
FF.5
→
FF.10
Which bar graph is correct? BMG
FF.8
→
FF.11
Create line plots F2U
FF.7
→
FF.12
Interpret line plots HY6
GG.4
Estimate lengths with inches and feet SDC
GG.5
Estimate lengths with inches, feet, and yards QQA
GG.6
Measure with different customary units: inches, feet, and yards 5VA
GG.4
→
GG.7
Which customary unit of length is appropriate: inches or feet? 5XG
GG.5
→
GG.8
Which customary unit of length is appropriate: inches, feet, or yards? GKJ
GG.9
Choose the best measuring tool: customary units of length 8SB
GG.6
→
GG.10
Compare lengths: customary units 8J4
GG.7
→
GG.11
Customary units of length: word problems GSF
HH.3
Estimate lengths with centimeters and meters 5BF
HH.4
Measure with different metric units FWF
HH.3
→
HH.5
Which metric unit of length is appropriate? SKH
HH.6
Choose the best measuring tool: metric units of length 26F
HH.4
→
HH.7
Compare lengths: metric units USJ
HH.5
→
HH.8
Metric units of length: word problems KJ5
II.1
Count sides and vertices EAQ
II.1
→
II.2
Identify quadrilaterals L9K
II.2
→
II.3
Identify pentagons JJN
II.3
→
II.4
Name polygons: up to 6 sides HUA
II.4
→
II.5
Classify polygons: up to 6 sides QUQ
II.5
→
II.6
Name polygons: up to 12 sides XWZ
II.6
→
II.7
Classify polygons: up to 12 sides AKR
II.
→
II.8
Sort two-dimensional shapes ZNH
II.7
→
II.9
Draw polygons H2L
II.8
→
II.10
Compose two-dimensional shapes QPK
JJ.2
→
JJ.1
Cubes K6N
JJ.3
→
JJ.2
Select three-dimensional shapes FAL
JJ.1
→
JJ.3
Name the three-dimensional shape 9E9
JJ.8
Sort three-dimensional shapes Z87
JJ.8
→
JJ.9
Shapes of everyday objects I
→
Three-dimensional shapes in the real world I 9VC
JJ.9
→
JJ.10
Shapes of everyday objects II
→
Three-dimensional shapes in the real world II 63Q
KK.4
Find the perimeter of a rectangle using centimeter cubes C5Y