http://www.corestandards.org/Math/Content/8/introduction/

### The Number System

• Know that there are numbers that are not rational, and approximate them by rational numbers.

### Expressions and Equations

• Work with radicals and integer exponents.

• Understand the connections between proportional relationships, lines, and linear equations.

• Analyze and solve linear equations and pairs of simultaneous linear equations.

### Functions

• Define, evaluate, and compare functions.

• Use functions to model relationships between quantities.

### Geometry

• Understand congruence and similarity using physical models, transparencies, or geometry software.

• Understand and apply the Pythagorean Theorem.

• Solve real-world and mathematical problems involving volume of cylinders, cones and spheres.

### Statistics and Probability

• Investigate patterns of association in bivariate data.

### Mathematical Practices

• Make sense of problems and persevere in solving them.

• Reason abstractly and quantitatively.

• Construct viable arguments and critique the reasoning of others.

• Model with mathematics.

• Use appropriate tools strategically.

• Attend to precision.

• Look for and make use of structure.

• Look for and express regularity in repeated reasoning.