Here is a list of all of the skills students learn in eighth grade! The skills are organized into categories, and you can move your mouse over any skill name to see a sample question. To start practicing, just click on any link. IXL will track your score, and the questions will even increase in difficulty as you improve!
Number theory
- A.1 Factors
- A.2 Divisibility rules
- A.3 Prime or composite
- A.4 Prime factorization
- A.5 Greatest common factor
- A.6 Least common multiple
- A.7 GCF and LCM: word problems
- A.8 Classify numbers
Integers
Operations with integers
- C.1 Integer addition and subtraction rules
- C.2 Add and subtract integers using counters
- C.3 Add and subtract integers
- C.4 Add and subtract three or more integers
- C.5 Add and subtract integers: word problems
- C.6 Integer multiplication and division rules
- C.7 Multiply and divide integers
- C.8 Simplify expressions involving integers and absolute values
- C.9 Evaluate variable expressions with integers and absolute values
Rational numbers
Operations with rational numbers
- E.1 Reciprocals and multiplicative inverses
- E.2 Add and subtract rational numbers
- E.3 Add and subtract rational numbers: word problems
- E.4 Multiply and divide rational numbers
- E.5 Multiply and divide rational numbers: word problems
- E.6 Simplify expressions involving rational numbers
- E.7 Evaluate variable expressions involving rational numbers
Exponents and roots
- F.1 Understanding exponents
- F.2 Evaluate exponents
- F.3 Exponents: solve for the variable
- F.4 Exponents with negative bases
- F.5 Exponents with decimal and fractional bases
- F.6 Understanding negative exponents
- F.7 Evaluate negative exponents
- F.8 Multiplication with exponents
- F.9 Division with exponents
- F.10 Multiplication and division with exponents
- F.11 Power rule
- F.12 Simplify expressions involving exponents
- F.13 Square roots of perfect squares
- F.14 Positive and negative square roots
- F.15 Estimate positive and negative square roots
- F.16 Relationship between squares and square roots
- F.17 Evaluate variable expressions involving squares and square roots
- F.18 Cube roots of perfect cubes
- F.19 Estimate cube roots
Scientific notation
Ratios and proportions
- H.1 Understanding ratios
- H.2 Equivalent ratios
- H.3 Equivalent ratios: word problems
- H.4 Compare ratios: word problems
- H.5 Unit rates
- H.6 Do the ratios form a proportion?
- H.7 Do the ratios form a proportion: word problems
- H.8 Solve proportions
- H.9 Solve proportions: word problems
- H.10 Estimate population size using proportions
- H.11 Rate of change
- H.12 Constant rate of change
- H.13 Scale drawings and scale factors
Proportional relationships
Percents
- J.1 Convert between percents, fractions, and decimals
- J.2 Compare percents to fractions and decimals
- J.3 Find what percent one number is of another
- J.4 Find what percent one number is of another: word problems
- J.5 Estimate percents of numbers
- J.6 Percents of numbers and money amounts
- J.7 Percents of numbers: word problems
- J.8 Compare percents of numbers
- J.9 Solve percent equations
- J.10 Percent of change
- J.11 Percent of change: word problems
Consumer math
- K.1 Price lists
- K.2 Unit prices
- K.3 Unit prices with unit conversions
- K.4 Unit prices: find the total price
- K.5 Percent of a number: tax, discount, and more
- K.6 Find the percent: tax, discount, and more
- K.7 Sale prices: find the original price
- K.8 Multi-step problems with percents
- K.9 Estimate tips
- K.10 Simple interest
- K.11 Compound interest
Measurement
Problem solving
Charts and graphs
- N.1 Interpret tables
- N.2 Interpret bar graphs
- N.3 Create bar graphs
- N.4 Interpret line graphs
- N.5 Create line graphs
- N.6 Interpret line plots
- N.7 Create line plots
- N.8 Interpret stem-and-leaf plots
- N.9 Interpret histograms
- N.10 Create histograms
- N.11 Create frequency charts
- N.12 Interpret box-and-whisker plots
- N.13 Scatter plots
- N.14 Interpret circle graphs
- N.15 Circle graphs and central angles
- N.16 Choose the best type of graph
Pythagorean theorem
Coordinate graphs
Geometry
- Q.1 Identify complementary, supplementary, vertical, adjacent, and congruent angles
- Q.2 Find measures of complementary, supplementary, vertical, and adjacent angles
- Q.3 Transversal of parallel lines
- Q.4 Classify triangles
- Q.5 Classify quadrilaterals
- Q.6 Find missing angles in triangles and quadrilaterals
- Q.7 Identify and classify polygons
- Q.8 Interior angles of polygons
- Q.9 Similar and congruent figures
- Q.10 Similar figures: side lengths and angle measures
- Q.11 Congruent figures: side lengths and angle measures
- Q.12 Congruence statements and corresponding parts
- Q.13 Congruent triangles: SSS, SAS, and ASA
- Q.14 Perimeter
- Q.15 Area
- Q.16 Area and perimeter: word problems
- Q.17 Parts of a circle
- Q.18 Circles: calculate area, circumference, radius, and diameter
- Q.19 Circles: word problems
- Q.20 Find lengths and measures of bisected lines and angles
- Q.21 Front, side, and top view
- Q.22 Base plans
- Q.23 Names and parts of 3-dimensional figures
- Q.24 Nets of 3-dimensional figures
- Q.25 Surface area of prisms and cylinders
- Q.26 Surface area of pyramids and cones
- Q.27 Volume of prisms and cylinders
- Q.28 Volume of pyramids and cones
- Q.29 Volume and surface area of spheres
- Q.30 Similar solids
- Q.31 Volume and surface area of similar solids
- Q.32 Perimeter, area, and volume: changes in scale
Transformations
- R.1 Identify reflections, rotations, and translations
- R.2 Translations: graph the image
- R.3 Translations: find the coordinates
- R.4 Reflections: graph the image
- R.5 Reflections: find the coordinates
- R.6 Rotations: graph the image
- R.7 Rotations: find the coordinates
- R.8 Dilations: graph the image
- R.9 Dilations: find the coordinates
- R.10 Dilations: scale factor and classification
- R.11 Symmetry
Number sequences
Variable expressions
Single-variable equations
- U.1 Does x satisfy the equation?
- U.2 Model and solve equations using algebra tiles
- U.3 Write and solve equations that represent diagrams
- U.4 Solve one-step linear equations
- U.5 Solve two-step linear equations
- U.6 Solve equations involving squares and square roots
- U.7 Solve multi-step equations
- U.8 Solve equations involving like terms
Linear functions
- V.1 Does (x, y) satisfy the linear equation?
- V.2 Evaluate a linear function
- V.3 Complete a function table
- V.4 Write a rule for a function table
- V.5 Find points on a function graph
- V.6 Graph a line from a function table
- V.7 Graph a line from an equation
- V.8 Linear function word problems
- V.9 Find the slope of a graph
- V.10 Find slope from two points
- V.11 Find slope from an equation
- V.12 Graph a line using slope
- V.13 Slopes of parallel and perpendicular lines
Nonlinear functions
Inequalities
Monomials and polynomials
- Y.1 Identify monomials
- Y.2 Model polynomials with algebra tiles
- Y.3 Add and subtract polynomials using algebra tiles
- Y.4 Add and subtract polynomials
- Y.5 Add polynomials to find perimeter
- Y.6 Multiply monomials
- Y.7 Divide monomials
- Y.8 Multiply and divide monomials
- Y.9 Powers of monomials
- Y.10 Square and cube roots of monomials
- Y.11 Multiply polynomials using algebra tiles
- Y.12 Multiply polynomials
- Y.13 Multiply polynomials to find area
Properties
Probability
- AA.1 Probability of simple events
- AA.2 Probability of opposite, mutually exclusive, and overlapping events
- AA.3 Experimental probability
- AA.4 Make predictions
- AA.5 Compound events: find the number of outcomes
- AA.6 Identify independent and dependent events
- AA.7 Probability of independent and dependent events
- AA.8 Factorials
- AA.9 Permutations
- AA.10 Combinations
- AA.11 Combination and permutation notation
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