I am livid on your behalf, shrift.
And, yeah, what brenda said: the student ought to 'fess up to the prize committee before you do.
I'm quite wroth at the thought of somebody stealing a big chunk of your words, but not really surprised that your words have been judged to be substantial-cash-prizeworthy.
Dear Ms. X,
I'm afraid I can't offer you forgiveness until you repent. In this case, that would mean confessing to the prize committee. Confessing to me is a good first step, but I'm not the only person you defrauded.
Or, you can let the thief go, shrift....
...in exchange for the index finger of his/her right hand. So everytime s/he types, s/he will remember that stealing words is wrong.
I think my first step in dealing with this problem shall be: 1) Go get beer.
Step number 2 can wait until tomorrow.
I'm thinking it probably wasn't only shrift's excellent prose that won the kid the award, so making the kid give up everything seems overly harsh. If it happened to me, I'd tell said kid, "Sounds like you need to tell the prize committee you forgot to cite a quote in that piece of writing you did, see what they make of it."
He was probably thinking, "I wish I could have made that point as well as shrift did, odds are this won't go anywhere--oh, hell."
He could have just let it slide, after all.
Charlie Brown just doesn't get old for me.
DXM, looks like the Dodgers went with Grady Little.
Yeah, I'm all aquiver with excitement...
Although I did think he got a bit of a raw deal up in Boston. At least it wasn't Fregosi...
If it happened to me, I'd tell said kid, "Sounds like you need to tell the prize committee you forgot to cite a quote in that piece of writing you did, see what they make of it."
shrift, assuming that you're either cool with it now because of the confession, or at least not angry about it, I think the above is the way to handle it. Tell her it's not fair to the other people who entered the contest. Then I'd forget about it, and let her be honorable or not, on her own.