My sister is a member of the PTA for a Staten Island, NY school, and has been fighting this tooth and nail for over a week now (when the PTA was informed by the principal that these things were going to be taught).
She was told (Paraphrasing) that if her children skipped parts of this curriculum (parents are given the option to keep their kids out of this class), that the ACS (Child Services) would be informed. This is Board Of Ed policy, btw. The Board of Ed has done this on it's own, without state mandates, either.
On the one hand, they give you the option of taking your kids out of these classes, and on the other, they threaten you with a report to the authorities.
Welcome to the world of indoctrination...errrr..education.
Two words. Home School.