Turn your classroom into a local cell phone store. Then, have your cell phone agents use linear equations to visually display three cell plans and their advantages. It makes for a great group project. Discuss how to decide which plan is best for each customer. This is a real-world problem that can be solved with math.

Concepts

intersection, linear equations, equations, systems of equations, two variables, unit rates

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Additional Tags

unit rate, linear equation, two variables, point of intersection, simultaneous equations, math

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Pros

• A great model for linear equations
• Uses critical thinking
• Illustrates the use of intersecting lines

Cons

• None

Common Core

8.EE.C.8.a