In all things related to the government (public schools are run by the government) look to the Constitution for your protections. The Constitution is the "Supreme Law" of our land, and the constitutiion guarantees (does not give, but guarantees) the inalienable rights granted to you by your Creator. First and foremost is your control over your self (body) and those of your children. READ it! There are a couple of places you can point to that clearly guarantee you the right to make this sort of decision for yourself (and not "obey" whatever crap they throw at you.) Let us know how it goes. If memory serves, Articles 9 and 14 have sections that pertain.