I second the above poster's response. Also, keep in mind that even in this part of the county, there are quite a few preschool programs through FCPS, and, as I understand it, you have the right to refuse one in favor of another. (Please correct me if this isn't right; I don't want to relay the wrong information!) So even if this particular teacher was involved at one school, your son might find a spot at a different one.
We think the Child Find people at Virginia Hills are awesome, and I don't know what we'd have done without them.
Good luck.
