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
Kindergarten
First
Second
Third
Fourth
Fifth
Sixth
Seventh
Eighth
Biology
Chemistry
Physics
Listing
Skill name and permanent skill ID
F.
→
F.8
Synthetic materials RXG
G.10
Collisions and car safety features NDM
JJ.
→
I.1
Electric forces and fields DK7
I.2
Magnetic forces and fields FPK
G.10
→
I.3
Compare magnitudes of magnetic forces Z8H
I.1
→
J.1
Predict heat flow and temperature changes UXV
I.2
→
J.2
Compare thermal energy transfers 7R4
J.1
→
K.1
How does particle motion affect temperature? 6LH
J.2
→
K.2
Particle motion and changes of state EXB
J.3
→
K.3
How does particle motion affect gas pressure? S6R
J.4
→
K.4
Identify how particle motion affects temperature and pressure A5L
K.
→
L.1
Transverse waves G67
K.
→
L.2
Longitudinal waves F75
K.1
→
L.3
Compare amplitudes, wavelengths, and frequencies of waves UWP
K.2
→
L.4
Compare energy of waves EDB
K.
→
L.5
Transmission, reflection, and absorption of waves 53H
K.
→
L.6
Electromagnetic waves F5E
K.
→
L.7
Applications of infrared waves GAF
L.8
Effects of ultraviolet waves YCJ
L.1
→
M.1
Compare concentrations of solutions QRN
L.2
→
M.2
Diffusion across membranes ZHC
M.1
→
N.1
Identify common and scientific names XXY
M.2
→
N.2
Origins of scientific names VJ8
M.3
→
N.3
Use scientific names to classify organisms ZHS
N.1
→
O.1
Structure and function: carbohydrates, lipids, proteins, and nucleic acids B62
N.2
→
O.2
Understanding the chemistry of cellular respiration
→
The chemistry of cellular respiration 28H
O.1
→
P.1
Understanding cells 6MP
O.2
→
P.2
Identify functions of plant cell parts 2P5
O.3
→
P.3
Identify functions of animal cell parts WCT
O.4
→
P.4
Plant cell diagrams: label parts 8YN
O.5
→
P.5
Animal cell diagrams: label parts WTJ
O.6
→
P.6
Compare cells and cell parts JLG
O.
→
P.7
Cell division
→
Mitosis and the cell cycle 2E9
Q.1
Organization in the human body TQ9
P.2
→
Q.2
Science literacy: how does the nervous system produce phantom pain? KNF
Q.1
→
R.1
Inherited and acquired traits: use evidence to support a statement H9U
Q.4
→
R.2
Genetic variation in sexual reproduction V6S
Q.2
→
R.3
Genetics vocabulary: genotype and phenotype NRK
Q.3
→
R.4
Genetics vocabulary: dominant and recessive NRE
Q.5
→
R.5
Complete and interpret Punnett squares Z74
Q.6
→
R.6
Use Punnett squares to calculate ratios of offspring types JPF
Q.7
→
R.7
Use Punnett squares to calculate probabilities of offspring types 5JF
Q.8
→
R.8
Genes, proteins, and traits: understanding the genetic code UFY
Q.9
→
R.9
Describe the effects of gene mutations on organisms G8V
Q.10
→
R.10
How do genes and the environment affect plant growth? YWF
R.1
→
S.1
How can animal behaviors affect reproductive success? Identify evidence to support a claim 4J2
R.2
→
S.2
Introduction to natural selection PZR
R.3
→
S.3
Calculate the percentages of traits in a population QFH
R.4
→
S.4
Calculate the averages of traits in a population ER9
R.5
→
S.5
Construct explanations of natural selection SLN
S.1
→
T.1
Compare fossils to modern organisms 78N
S.2
→
T.2
Compare ages of fossils in a rock sequence THN
T.1
→
U.1
Angiosperm and conifer life cycles RWV
T.2
→
U.2
Moss and fern life cycles 25U
U.1
→
V.1
How do plants use and change energy? LPG
U.2
→
V.2
Identify the photosynthetic organism 2XT
V.1
→
W.1
Describe populations, communities, and ecosystems X85
V.2
→
W.2
Identify ecosystems 84U
V.3
→
W.3
Describe ecosystems BFK
W.1
→
X.1
How does matter move in food chains? BAX
W.2
→
X.2
Interpret food webs I USZ
W.3
→
X.3
Interpret food webs II 7B9
W.4
→
X.4
Use food chains to predict changes in populations L8A
W.5
→
X.5
Classify symbiotic relationships 7GL
W.6
→
X.6
Investigate primary succession on a volcanic island NJ2
X.1
→
Y.1
Coral reef biodiversity and human uses: explore a problem LXJ
X.2
→
Y.2
Coral reef biodiversity and human uses: evaluate solutions XSU
Y.1
→
Z.1
Evaluate claims about natural resource use: groundwater SM8
Y.2
→
Z.2
Evaluate claims about natural resource use: fossil fuels 49V
Z.1
→
AA.1
Identify rocks and minerals DGF
Z.2
→
AA.2
Introduction to the rock cycle TVH
Z.3
→
AA.3
Label parts of rock cycle diagrams HSS
Z.4
→
AA.4
Select parts of rock cycle diagrams BKK
AA.1
→
BB.1
Label Earth layers 2N2
AA.2
→
BB.2
Label Earth features at tectonic plate boundaries WDW
AA.3
→
BB.3
Describe tectonic plate boundaries around the world NF6
BB.1
→
CC.1
Select parts of a topographic map LPB
CC.1
→
DD.1
Label parts of water cycle diagrams 6CR
CC.2
→
DD.2
Select parts of water cycle diagrams VW6
II.
→
DD.3
The carbon cycle N9Q
DD.4
→
EE.1
Explore air masses J5E
DD.5
→
EE.2
Identify and compare air masses ATL
DD.6
→
EE.3
How do air masses form? 8Y9
EE.1
→
EE.4
The greenhouse effect HWX
DD.1
→
FF.1
Use data to describe climates GDY
DD.2
→
FF.2
Factors affecting climate: latitude GQP
DD.
→
FF.3
Factors affecting climate: altitude A74
DD.3
→
FF.4
Factors affecting climate: distance from the ocean T8G
FF.5
Factors affecting climate: surface ocean currents 7YR
FF.1
→
GG.1
Analyze natural hazard maps U6D
GG.1
→
HH.1
Analyze models of the Earth-Sun-Moon system 6D7
GG.2
→
HH.2
Identify phases of the Moon 7L5
GG.
→
HH.3
Solar eclipses R8K
HH.4
Lunar eclipses DQF
GG.3
→
HH.5
What causes the seasons on Earth? SSG
GG.4
→
HH.6
Analyze data to compare properties of planets DKS
GG.5
→
HH.7
Identify constellations TJ7
HH.8
Structure of the universe R2M
HH.1
→
II.1
Choose customary units of distance, mass, and volume HQE
HH.2
→
II.2
Choose metric units of distance, mass, and volume PF6
HH.3
→
II.3
Estimate temperatures DTX
HH.4
→
II.4
Abbreviate length, speed, and acceleration units
→
Abbreviate time, length, speed, and acceleration units 6RX
HH.5
→
II.5
Abbreviate temperature, mass, and volume units WLS
HH.6
→
II.6
Abbreviate force, energy, and electricity units F82
P.1
→
Organization in the human body: the heart and the circulatory system
This skill has been removed.