Find out when the per pupil funding date is final for the school year. (In Colorado, it's October first, meaning any kid not enrolled by that date isn't funded. So a kid that enrolls after that date has to be accepted at his public school, but the school gets no state funding for him. If this is how VA is, you can really damage them.) If they get daily funding, everyday a kid is out there is no money. Multiply that by the number of kids who will boycott. Hit them in the pocketbook. Let them know and make it stick.
Set up a contingency plan of what to do with the kids whose parents both work. Maybe contact employers and warn them that some in their work force will be needing vacation or personal time because of the district. Put pressure on the school board. Start calling for vouchers. Let Fairfax be the education shot heard round the world.