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!

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Spanish language arts
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Listing
Skill name and permanent skill ID
F.10
Solve advanced linear inequalities
→
Solve multi-step linear inequalities 9K8
F.11
Graph solutions to advanced linear inequalities
→
Graph solutions to multi-step linear inequalities 5GC
I.5
Midpoint and distance formulas: mixed practice 62B
K.5
Slope: mixed practice QYH
L.18
Graph a linear equation: mixed practice 47Z
L.18
→
L.19
Slopes of parallel and perpendicular lines ADB
L.19
→
L.20
Write an equation for a parallel or perpendicular line 5SH
M.17
Estimate average rate of change from a graph W42
M.17
→
M.18
Checkpoint: Function concepts HWA
M.18
→
M.19
Checkpoint: Average rate of change T79
M.19
→
M.20
Checkpoint: Solve equations using graphs and tables DV9
T.6
Add, subtract, multiply, and divide numbers written in scientific notation 6MU
T.7
Add, subtract, multiply, and divide numbers written in scientific notation: word problems XJ8
U.7
Write variable expressions for arithmetic sequences
→
Write a formula for an arithmetic sequence 5VF
V.9
Exponential growth and decay KZQ
V.9
→
V.10
Exponential growth and decay: word problems UKG
V.10
→
V.11
Compound interest: word problems QSF
W.13
Add, subtract, and multiply polynomials NPC
W.13
→
W.14
Divide polynomials by monomials 72C
W.14
→
W.15
Divide polynomials using long division LY7
W.15
→
W.16
Checkpoint: Polynomial operations 2B7
Y.12
Write a quadratic function in standard form from its vertex and another point 9XG
Y.12
→
Y.13
Write a quadratic function in factored form from its x-intercepts and another point UDD
Y.
→
Y.14
Write a quadratic function in standard form from its x-intercepts and another point LZH
Y.13
→
Y.15
Interpret parts of quadratic expressions: word problems VHB
EE.1
Simplify radical expressions
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Simplify square roots ZFF
EE.2
Simplify radical expressions with variables
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Simplify radical expressions with variables: square roots 82V
EE.5
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EE.3
Add and subtract radical expressions
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Add and subtract radical expressions: square roots DLV
EE.4
Multiply radical expressions
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Multiply radical expressions: square roots HMX
EE.3
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EE.5
Simplify radical expressions involving fractions
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Simplify radical expressions involving fractions: square roots VRZ
EE.6
Simplify radical expressions using the distributive property
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Simplify radical expressions using the distributive property: square roots 28V
EE.7
Simplify radical expressions using conjugates
→
Simplify radical expressions using conjugates: square roots TYC
GG.2
→
GG.1
Simplify rational expressions Q7U
GG.3
→
GG.2
Multiply and divide rational expressions LX9
GG.4
→
GG.3
Add and subtract rational expressions ELX
GG.5
→
GG.4
Simplify mixed rational expressions
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Add, subtract, multiply, and divide rational expressions NZY
GG.6
→
GG.5
Solve rational equations VLW
HH.1
Create line plots
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Create dot plots N2E
HH.2
Interpret line plots
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Interpret dot plots PXN
II.6
Variance and standard deviation
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Standard deviation of a population HX5
II.7
Standard deviation of a sample W6S
II.7
→
II.8
Choose appropriate measures of center and variation MHC
II.8
→
II.9
Checkpoint: Compare data sets DJA
JJ.1
Create and interpret two-way frequency tables 85J
JJ.1
→
JJ.2
Interpret a scatter plot 8BS
JJ.2
→
JJ.3
Outliers in scatter plots EG5
JJ.3
→
JJ.4
Match correlation coefficients to scatter plots FQ7
JJ.4
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JJ.5
Calculate correlation coefficients E8T
JJ.5
→
JJ.6
Write equations for lines of best fit Y2S
JJ.6
→
JJ.7
Interpret lines of best fit: word problems AF2
JJ.7
→
JJ.8
Find the equation of a regression line WJC
JJ.8
→
JJ.9
Interpret regression lines SEQ
JJ.9
→
JJ.10
Analyze a regression line of a data set 8D8
JJ.10
→
JJ.11
Exponential regression MRY
JJ.11
→
JJ.12
Correlation and causation KPG
KK.11
→
JJ.13
Checkpoint: Two-way frequency tables 5GL
JJ.12
→
JJ.14
Checkpoint: Linear modeling U7N
KK.5
→
KK.3
Outcomes of compound events GKA
KK.6
→
KK.4
Identify independent and dependent events 5A7
KK.7
→
KK.5
Probability of independent and dependent events WRJ
KK.8
→
KK.6
Counting principle GTX
KK.9
→
KK.7
Permutations SFZ
KK.10
→
KK.8
Permutation and combination notation 7TT
GG.1
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Rational functions: asymptotes and excluded values B6J
KK.3
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Find probabilities using two-way frequency tables 93R
KK.4
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Find conditional probabilities using two-way frequency tables BZZ