Love it, very inspiring!
I think that alot of people not just parents do not feel like they know how to approach something they feel is unjust! Where do you begin, what can you actually do about it? I think its so difficult to challenge establishments, because if you want to hit them where it hurts, I believe you need to have money or be well connected! Even so I think even if you have this it only changes the situation for yourself and not for everyone.
What will it take to stop establishments abusing there rights and the rights of others. People need to be educated on there rights, but I do feel like we are fighting a losing battle!
The letter is great, and the book sounds great, but I think if you really want the school to change its attitudes you should cause them much more trouble! You could try getting a few other mums on side, make a fuss outside the school, give out leaflets raise awareness of what's going on and definitely go to media outlets! I'm not sure if you already did this but I do love it when people stick it to the man! Schools seem to reach obedience not free thinking!