Legal help concerning High School Policies and Rules?

Ok people i need some help. I need to know what the limits of a high school rule book and policies are. More and more often im hearing what sounds to me like blatant desregard of basic rights. Its no secret that schools suppress freedom of speech, freedom of expression, and always escalate matters to a higher level than necessary. Why is it that a school administrator can simply call the police and say that a person was being disruptive and can make the police officer give a person a ticket. How is it that, oh say, throwing a piece of paper across the room deserve me getting a ticket for distrubing the piece and nearly getting one for inciting a riot! This is all very true it happened to me during the school year! This is unfair and for some reason they can never be proven wrong. Can the law really be manipulated like that? Ju8t to make examples of students? Just cause the admin. dont like me can they do this?