Lesson plan
Archived
teaches
Common Core State Standards
CCSS.Math.Content.6.RP.A.3
http://corestandards.org/Math/Content/6/RP/A/3
teaches
Common Core State Standards
CCSS.Math.Content.6.RP.A.3b
http://corestandards.org/Math/Content/6/RP/A/3/b
teaches
Common Core State Standards
CCSS.Math.Practice.MP2
http://corestandards.org/Math/Practice/MP2
teaches
Common Core State Standards
CCSS.Math.Practice.MP5
http://corestandards.org/Math/Practice/MP5
teaches
Common Core State Standards
CCSS.Math.Practice.MP7
http://corestandards.org/Math/Practice/MP7
Big Ideas:
A unit rate is a rate where the second quantity is 1.
Unit rates make it easy to make comparisons between two different rates.
Double number lines are an effective tool for finding unit rates and comparing rates.
This lesson builds on students' understanding of equivalent ratios. In this task, students work with finding equivalent rates of speed by helping three students who are decorating cookies for a bake sale resolve the question, who decorates cookies the fastest? By using double number lines, they will establish a unit rate of decorating speed for each cookie decorator and compare these unit rates. This lesson builds towards a solid understanding of uses for unit rates, and leads towards proportional reasoning that students will develop in grades 7 and 8.
Vocabulary:
Ratio, rate, unit rate, double number line, table
Special Materials:
Pattern blocks (optional)
Counters (optional)
Unifix cubes (optional)