Lesson plan

Lesson 21: One Hundred and Eighty

teaches Common Core State Standards HSG-CO.A.2 http://corestandards.org/Math/Content/HSG/CO/A/2
teaches Common Core State Standards HSG-CO.C.10 http://corestandards.org/Math/Content/HSG/CO/C/10
teaches Common Core State Standards HSG-CO.C.9 http://corestandards.org/Math/Content/HSG/CO/C/9
teaches Common Core State Standards MP5 http://corestandards.org/Math/Practice/MP5
teaches Common Core State Standards MP7 http://corestandards.org/Math/Practice/MP7