What I would do would be to organize a 'parents' night. Bill it as a
free craft night, or learn to paint night. Encorage these parents to
bring their kids. Make it a kid and parent night....or think of a
theme...get the picture?
Next I would do a bang up job for that evening. (This will be a lot of
work, but if you do it right, you will get the parents, and community on
your side). I would have everything prepared in advance, have my best
lesson available, and teach it with a straight face. (what that means is
don't let them know that your intention is to let them know what
miserable conditions you have). Then, let it DAWN ON THEM slowly. And
it will. LET THEM TAKE THE FIGHT TO THE BOARD.
I believe in setting the balls rolling to get what I need in life.
Sometimes it will take 1 day, and sometimes it might take 3 years, but
if you are successful at this subversive resistance stuff, everyone will
do what needs to be done, and the finger will rarely be pointed at
you...try it, it works!
The closest I have ever come to your situation was that my sink went out
in my room. And with a straight face, I encouraged my kids to clean up
(the water worked, but the sink didn't) and pour the dirty water out the
window. I think this is one of my quickest solutions, because in less
than one hour, my sink was fixed (and this after complaining, and
filling out paperwork in the proper manner--a three day ordeal!).