One Direction at Cardinal Heights?

One Direction's manager, Sid Smeal called me last night. He's looking for a middle school for the band to do a show in. He needs to know the specifications of the gym and seating arrangements pronto.

Today's Learning goal: Operation One Direction
Today I will...

• I will organize a concert
• Use an open array to solve a real-life concert emergency
• Use a different strategy to check if my solution makes sense
• make use of friendly numbers so I can communicate my ideas to Sid Smeal and the class

This is a ficticious problem. There is no way that One Direction is coming here. Or are they?