## Lesson: Rates

Introducing the Concept

Your students may have encountered rates and ratios before, but they will need to do a thorough review of these concepts before proceeding to use them to solve problems.

**Prerequisite Skills and Concepts:** Students should have a basic understanding of ratios — how to write them and how to simplify them. Students should also have an ability to work with fractions and find equivalent fractions.

“One animal can run 60 feet in 4 seconds, while another animal can run 100 feet in 8 seconds. Which animal runs the fastest?”

(The first animal runs the fastest at 15 feet per second.)