Lesson Plan

Distinguish a rate (ratio of unlike quantities) from a same-unit ratio, and recognize that rates do not require time as one of the units.

Define the unit rate a/b associated with a ratio a:b (with b != 0) as the value of a corresponding to one of b.

Compute the unit rate from a ratio by dividing a / b, using a ratio table or double number line to make the scaling explicit.

Read and write a unit rate using rate language: "___ per ___" or "___ for each ___", including the unit label as part of the answer.

Recognize that every ratio a:b yields two unit rates -- a/b (a per one b) and b/a (b per one a) -- and choose the one that fits a given question.

Use a unit rate in rate language to describe a ratio relationship in real-world contexts, including the standard's recipe and hamburger examples.

6.RP.A.2

Understand the concept of a unit rate $a/b$ associated with a ratio $a:b$ with $b \neq 0$, and use rate language in the context of a ratio relationship. For example, "This recipe has a ratio of 3 cups of flour to 4 cups of sugar, so there is 3/4 cup of flour for each cup of sugar." "We paid $75 for 15 hamburgers, which is a rate of $5 per hamburger." -- Standard 6.RP.A.2 Expectations for unit rates in this grade are limited to non-complex fractions. -- CCSS, 6.RP.A.2 footnote