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
A.4
→
A.3
Value of a digit WLP
A.3
→
A.4
Relationship between place values 9DJ
A.6
Writing numbers up to one million in words: convert words to digits
→
Writing numbers up to one million: convert between words and digits 5G4
A.8
Writing numbers up to one billion in words: convert words to digits
→
Writing numbers up to one billion: convert between words and digits RWK
D.3
Add two numbers up to five digits
→
Add two multi-digit numbers RG2
D.4
Add two numbers up to five digits: word problems
→
Add two multi-digit numbers: word problems ZPY
E.3
Subtract numbers up to five digits
→
Subtract two multi-digit numbers VP2
E.4
Subtract numbers up to five digits: word problems
→
Subtract two multi-digit numbers: word problems R9N
G.3
Understand factors and factor pairs 8ZV
G.3
→
G.4
Identify factors 2S9
G.4
→
G.5
Find all the factor pairs of a number URL
G.5
→
G.6
Choose the multiples of a given number up to 10 EFB
G.6
→
G.7
Choose the multiples of a given number up to 12 ENC
G.8
Sort multiples into a Venn diagram JMX
G.7
→
G.9
Prime and composite: up to 20 TNF
G.8
→
G.10
Prime and composite: up to 100 L9R
H.12
Multiply 1-digit numbers by 3-digit or 4-digit numbers using area models I
→
Multiply 1-digit numbers by 3-digit or 4-digit numbers: choose the area model RP9
H.13
Multiply 1-digit numbers by 3-digit or 4-digit numbers using area models II
→
Multiply 1-digit numbers by 3-digit or 4-digit numbers using area models WKL
H.19
Multiply three numbers up to two digits each
→
Multiply three numbers FNQ
I.2
Multiply numbers ending in zeroes
→
Multiply by multiples of ten 7NS
I.3
Multiply numbers ending in zeroes: word problems
→
Multiply two multiples of ten: word problems K98
I.6
Multiply 2-digit numbers by 2-digit numbers using area models I
→
Multiply 2-digit numbers by 2-digit numbers: choose the area model ASZ
I.7
Multiply 2-digit numbers by 2-digit numbers using area models II
→
Multiply 2-digit numbers by 2-digit numbers using area models 8K7
K.2
Divide numbers ending in zeroes by 1-digit numbers
→
Divide numbers ending in zeros by 1-digit numbers 2K3
K.16
Estimate quotients
→
Estimate to compare quotients RCU
L.1
Divide numbers ending in zeros by 1-digit numbers: word problems 6J4
L.1
→
L.2
Divide 2-digit numbers by 1-digit numbers: interpret remainders 5WV
L.2
→
L.3
Divide 2-digit numbers by 1-digit numbers: word problems QMT
L.3
→
L.4
Divide larger numbers by 1-digit numbers: interpret remainders J8D
L.4
→
L.5
Divide larger numbers by 1-digit numbers: word problems DKK
L.6
Divide larger numbers by 1-digit numbers: comparison word problems 9GX
M.1
Add and subtract numbers ending in zeroes
→
Add and subtract numbers ending in zeros WEG
M.4
Equations with mixed operations: true or false T47
M.4
→
M.5
Comparison word problems with addition and subtraction RJJ
M.6
Comparison word problems with multiplication and division: larger numbers AH8
M.5
→
M.7
Addition, subtraction, multiplication, and division word problems QKS
M.6
→
M.8
Choose numbers with a particular sum, difference, product, or quotient X9G
M.7
→
M.9
Find two numbers based on sum and difference KA2
M.8
→
M.10
Find two numbers based on sum and product JPD
M.9
→
M.11
Find two numbers based on sum, difference, product, and quotient RLS
M.10
→
M.12
Inequalities involving addition, subtraction, multiplication, and division 95Y
M.11
→
M.13
Write equations to represent word problems 5SJ
M.12
→
M.14
Solve equations XWW
M.15
Use equations to solve addition and subtraction word problems F5H
M.16
Understand parentheses in equations XAJ
N.2
Use equations to solve multi-step addition and subtraction word problems J8E
N.2
→
N.3
Multi-step word problems with strip diagrams CZQ
N.3
→
N.4
Use strip diagrams to represent and solve multi-step word problems G8Z
N.5
Use equations to solve multi-step multiplication word problems ZJ5
N.6
Use equations to solve multi-step division word problems VDA
N.4
→
N.7
Multi-step word problems EA9
N.5
→
N.8
Multi-step word problems involving remainders SLS
N.6
→
N.9
Multi-step word problems: identify reasonable answers K6X
N.7
→
N.10
Word problems with extra or missing information X64
N.8
→
N.11
Solve word problems using guess-and-check PCA
O.10
Extend repeating shape patterns AKK
O.10
→
O.11
Multiplication input/output tables BEP
O.11
→
O.12
Multiplication input/output tables: find the rule KQG
O.12
→
O.13
Use a rule to complete an input/output table DP8
O.13
→
O.14
Input/output tables with addition, subtraction, multiplication, and division HDS
P.6
Find equivalent fractions using multiplication and division K8C
P.6
→
P.7
Identify equivalent fractions GSG
P.7
→
P.8
Equivalent fractions: find the missing numerator or denominator 7CY
P.8
→
P.9
Patterns of equivalent fractions 7LH
P.9
→
P.10
Fractions with denominators of 10 and 100 VLP
P.10
→
P.11
Write fractions in lowest terms 3R5
R.15
Compare mixed numbers 5TV
T.7
Add and subtract fractions with like denominators: multi-step word problems 5G5
T.7
→
T.8
Compare sums and differences of fractions with like denominators LJC
T.9
Add and subtract mixed numbers with like denominators - without regrouping WZN
T.8
→
T.10
Add mixed numbers with like denominators L9M
T.9
→
T.11
Subtract mixed numbers with like denominators SLQ
T.10
→
T.12
Add and subtract mixed numbers with like denominators 9AS
T.13
Add and subtract mixed numbers with like denominators in recipes YB5
T.11
→
T.14
Add and subtract mixed numbers with like denominators: word problems 6KM
T.15
Add and subtract fractions and mixed numbers with like denominators: multi-step word problems PR2
W.9
Multiply mixed numbers by whole numbers: word problems SFV
W.9
→
W.10
Multiply fractions and mixed numbers by whole numbers in recipes 7B3
W.11
Multiply fractions and mixed numbers by whole numbers: multi-step word problems QDB
W.10
→
W.12
Fractions of a number: model and multiply 6GM
W.11
→
W.13
Fractions of a number QB8
W.12
→
W.14
Fractions of a number: word problems 73D
AA.7
Add and subtract money amounts: word problems 2D5
AA.7
→
AA.8
Add, subtract, multiply, and divide money amounts XCB
AA.8
→
AA.9
Multi-step word problems with money: addition and subtraction only UGK
AA.9
→
AA.10
Multi-step word problems with money 9XT
BB.3
Create line plots
→
Create line plots with fractions GNT
BB.5
Interpret line plots with fractions: multi-step problems JVG
BB.5
→
BB.7
Interpret line graphs 36B
BB.7
→
BB.9
Interpret bar graphs 48Z
BB.10
Interpret bar graphs: multi-step problems NCJ
BB.10
→
BB.11
Create frequency charts
→
Create frequency tables BVV
BB.9
→
BB.12
Interpret frequency charts
→
Interpret frequency tables PKD
BB.13
Create frequency tables with numerical data SVG
BB.14
Interpret frequency tables with numerical data UAE
BB.12
→
BB.15
Create stem-and-leaf plots UDS
BB.11
→
BB.16
Interpret stem-and-leaf plots SLX
CC.1
Find the mode M9S
CC.2
Find the median QPS
CC.3
Find the range 7EE
CC.4
Find the mode, median, or range BRS
CC.5
Interpret stem-and-leaf plots to find the median, mode, or range 2FY
CC.6
Interpret tables to find the median, mode, or range 63W
CC.7
Interpret line plots to find the median, mode, or range 2SY
CC.1
→
DD.1
Convert time units VNU
CC.2
→
DD.2
Convert mixed time units K2S
CC.3
→
DD.3
Add and subtract mixed time units VD2
CC.4
→
DD.4
Elapsed time TUH
CC.5
→
DD.5
Elapsed time: word problems VCC
CC.6
→
DD.6
Find start and end times: multi-step word problems ZQP
DD.7
Elapsed time: read a schedule FNR
CC.7
→
DD.8
Transportation schedules DYF
CC.8
→
DD.9
Time zones F97
CC.9
→
DD.10
Fractions of time units M9F
DD.1
→
EE.1
Measure using an inch ruler EDW
DD.2
→
EE.2
Which customary unit is appropriate? YYA
DD.3
→
EE.3
Compare and convert customary units of length
→
Convert and compare customary units of length A89
DD.4
→
EE.4
Compare and convert customary units of weight
→
Convert and compare customary units of weight LJV
DD.5
→
EE.5
Compare and convert customary units of volume
→
Convert and compare customary units of volume GAA
DD.6
→
EE.6
Compare and convert customary units
→
Convert and compare customary units DRM
DD.7
→
EE.7
Conversion tables - customary units LSP
DD.8
→
EE.8
Compare customary units by multiplying 8U7
DD.9
→
EE.9
Convert mixed customary units U95
DD.10
→
EE.10
Add and subtract mixed customary units GGD
EE.1
→
FF.1
Which metric unit is appropriate? FPM
EE.2
→
FF.2
Compare and convert metric units of length
→
Convert and compare metric units of length GZM
EE.3
→
FF.3
Compare and convert metric units of weight
→
Convert and compare metric units of mass 7RC
EE.4
→
FF.4
Compare and convert metric units of volume
→
Convert and compare metric units of volume FHV
EE.5
→
FF.5
Compare and convert metric units
→
Convert and compare metric units UL5
EE.6
→
FF.6
Conversion tables - metric units YTJ
EE.7
→
FF.7
Convert mixed metric units YP2
EE.8
→
FF.8
Add and subtract mixed metric units WAL
FF.1
→
GG.1
Measurement word problems 2PY
FF.2
→
GG.2
Measurement word problems with fractions UST
GG.3
Multi-step measurement problems with conversions KXC
GG.1
→
HH.1
Perimeter of polygons HLW
GG.2
→
HH.2
Perimeter: find the missing side length QAC
GG.3
→
HH.3
Find the perimeter of rectangles using formulas KGJ
GG.4
→
HH.4
Perimeter: word problems GBE
HH.1
→
II.1
Create rectangles with a given area BMV
HH.2
→
II.2
Find the area of rectangles using formulas JBF
HH.3
→
II.3
Find the area or missing side length of a rectangle 9E6
HH.4
→
II.4
Area: word problems JW7
HH.5
→
II.5
Area of complex figures 38W
HH.6
→
II.6
Area between two rectangles GY2
HH.7
→
II.7
Compare area and perimeter of two figures
→
Compare area and perimeter of rectangles and squares S7Y
II.8
Rectangles with the same perimeter or area LBZ
HH.8
→
II.9
Relationship between area and perimeter SKK
HH.9
→
II.10
Area and perimeter: word problems LTP
II.11
Area and perimeter of complex figures: word problems HWY
HH.10
→
II.12
Rectangles: relationship between perimeter and area word problems S9M
HH.11
→
II.13
Use area and perimeter to determine cost 5GF
II.1
→
JJ.1
Points, lines, line segments, rays, and angles 9MK
II.2
→
JJ.2
Parallel, perpendicular, and intersecting lines 8VQ
II.3
→
JJ.3
Identify parallel, perpendicular, and intersecting lines DSU
JJ.4
Sides and angles in polygons 67D
JJ.1
→
KK.1
Acute, right, obtuse, and straight angles R5K
JJ.2
→
KK.2
Angles as fractions of a circle N72
JJ.3
→
KK.3
Use fractions to find the measure of an angle Q68
JJ.4
→
KK.4
Angles of 90, 180, 270, and 360 degrees UQV
JJ.5
→
KK.5
Measure angles on a circle RK8
JJ.6
→
KK.6
Measure angles with a protractor NCN
JJ.7
→
KK.7
Draw angles with a protractor R9K
JJ.8
→
KK.8
Estimate angle measurements LUJ
JJ.9
→
KK.9
Adjacent angles VJY
JJ.10
→
KK.10
Angle measures: word problems YUA
KK.11
Solve problems involving angle measures MBL
KK.1
→
LL.1
Acute, obtuse, and right triangles 7QK
KK.2
→
LL.2
Scalene, isosceles, and equilateral triangles 5UV
KK.3
→
LL.3
Classify triangles U59
LL.1
→
MM.1
Parallel sides in quadrilaterals 58M
LL.2
→
MM.2
Sides and angles of quadrilaterals PTK
LL.3
→
MM.3
Identify parallelograms DJ9
LL.4
→
MM.4
Identify trapezoids 9MJ
LL.5
→
MM.5
Identify rectangles GHH
LL.6
→
MM.6
Identify rhombuses KUU
LL.7
→
MM.7
Classify quadrilaterals A6V
LL.8
→
MM.8
Pick all the names for a quadrilateral 6CT
MM.9
Name quadrilaterals more than one way TND
LL.9
→
MM.10
Draw quadrilaterals L5Y
MM.1
→
NN.1
Identify lines of symmetry 9FD
MM.2
→
NN.2
Draw lines of symmetry SQF
MM.3
→
NN.3
Count lines of symmetry MWS
NN.1
→
OO.1
Identify fixed and variable expenses DFH
NN.2
→
OO.2
Calculate profit: word problems 2W3
NN.3
→
OO.3
Compare savings options 5RN
NN.4
→
OO.4
Budget a weekly allowance: word problems J9K
NN.5
→
OO.5
Financial institution vocabulary EEV