Arizona College Preparatory opened its doors in 2007 becoming Chandler Unified School District’s first secondary school-of-choice. With the Spiritline program founded in the early 2010s. 

At ACP, the traditional sideline cheer team and the dance-based pomline come together as one united front: Knightline. It is ACP’s own twist on a traditional spiritline, where together they lead the charge in school pride and spirit.