I haven't told my high school, and I don't plan to tell my college [s]because I'm paranoid[/s] because I don't want to get any s**t from them. I mean, they'll probably mean well and everything, but I want to teach elementary school and I don't want a prospective employer looking back at my records and being less likely to hire me because he goes all, "Hmmm... so she's like Rain Man, then?" Of course they're not supposed to make judgements like that, but unfortunately, I doubt that it always works out that way.
I'd say whether you tell them or not should depend on your own personal situation- just weigh the benefits vs. the pitfalls. 
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"eeeep!" says the insane chibling.
And then. . .
It attacks.
(P.S. Ze opéra ghost wants ?is paycheck.)