Lesson Plan: Cube Roots of Perfect Cubes Mathematics • 8th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to find cube roots of perfect cube integers.

Objectives

Students will be able to

  • take the cube root of a perfect cube,
  • take the cube root of a negative perfect cube,
  • understand that
    • the cube root preserves signs,
    • the cube root of 𝑎=𝑎,
    • the cube root of 0=0,
  • find the dimensions of a cube given the volume by using cube roots.

Prerequisites

Students should already be familiar with

  • finding square roots of rational numbers.

Exclusions

Students will not cover

  • taking the cube root of other rational numbers (such as 278 or 0.004),
  • solving equations involving cube roots.

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