If you're looking in the Seattle area, check out the Accelerated Progress Program (APP) in the Seattle school district. They generally have their kids working 2 grade levels above average in self-contained classrooms.

I wish we still lived there...can't convince my DH to move again smile

Oh, and if you can get her current school to somehow certify that she has completed K or 1st or 2nd, etc., I believe most schools in WA will accept it, regardless of her age. The certification just has to be from an accredited school.