No Faculty Advisor?
I know it's a movie, and suspension of disbelief and all that.
BUT
This is a high school cheer squad. The majority of the squad is most likely underage. They wouldn't be legally allowed to travel alone, much less contract with a choreographer for a routine. And then there's the whole premise of the squad conducting tryouts alone, and conducting fundraisers.
And yet, there is nary a whisper of a Faculty Advisor or chaperone of any kind ANYWHERE, most jarringly when they're on the road at the competitions.
There is not a school on earth that would allow a dozen or more teenagers free reign like this. It's hugely distracting and takes away some of the enjoyment of the movie.