Er... It's called cultural diversity and free speech. Next you're going to be preaching at us about how we need to get anybody that isn't white with blonde hair and blue eyes out of our schools and away from our poor little children, right?
Heil, Fuhrer. *Rolls eyes*
And you know what else? The entirety of your question is misinformation and crude, unfounded accusation.
Pagans don't recruit, and especially not students. That's cults, like the Jehovah's Witnesses and Scientologists. (I don't recommend that previous comment being disputed, I have seen this happen before, several times.) If anybody is recruiting, it is the Christians; and our basic rights as Americans, whether I'm proud to be American or not, are being intruded upon. (Open letter to the Kansas School Board by Bobby Henderson; The polite (and funny) way to change bad circumstances: http://www.venganza.org/about/open-letter/)
Paganism isn't generally the counter-cultural path taken; Neopaganism is, and those that are Neopagans are also those sort that would proclaim that they were, because it sounds cooler. However, this is a fake religion patched together from books and movies like Harry Potter. People usually grow out of this, and real Pagans call these people "Qwiccans" or "fluff-bunnies."
Christianity has not been excluded from schools; in fact, it is being forced on students (see letter to Kansas School Board above).
And teachers, in my experience, often persecute Pagan students and support Christian students with impunity, which, in the United States of America, is actually a crime and an infringement of the students' rights.
And there has been no rise in the number of Pagan students. Families that have been Pagan for generations, no longer afraid of persecution by the Nazi-esque regime that you seem to suggest, with Christianity in schools, simply voice their opinions now.