By CAYLA HARRIS - An online invitation showed up in the Class of 2015 email box Tuesday morning that asked class members to edit a document titled “Senior Prank Ideas.” Those who did quickly faced disciplinary action, they said.

By GINA TALAMO and TYLER PALEY Editor-in-Chief and Managing Editor The class of 2013 will graduate at 2 p.m. Wednesday, having executed their senior prank in the parking lot on Friday before school. The...