8th grade

Big Ideas, 8th grade:

Grade 8 Overview


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.


    • Define, evaluate, and compare functions.

    • Use functions to model relationships between quantities.


    • 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.