# Lesson Plan: Ratios

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to use a ratio to describe the relationship between two quantities, simplify ratios, and find equivalent ratios.

#### Objectives

Students will be able to

• use ratio to describe the relationship between two quantities, expressed with ratio notation,
• understand how two quantities expressed as a ratio can be expressed proportionally as a fraction, and vice versa,
• recognize that a ratio expressed in its simplest form contains only integer values,
• express a ratio in its simplest form,
• find an equivalent ratio,
• convert values in a word problem into a ratio.

#### Prerequisites

Students should already be familiar with

• modeling sentences that represent a ratio using bar models, or otherwise,
• simplifying fractions,
• multiples of numbers.

#### Exclusions

Students will not cover

• ratios between three quantities,
• unit ratio,
• dividing a quantity in a given ratio.