I guess I'm not 100% clear what exactly is being taught, and where:
1) Grade-schoolers, or jr. high/high-schoolers? Is there any public school system in the US where homosexuality is addressed in grade school classes? Not "Heather Has Two Mommies," but actually as part of a class?
2) The barest info (i.e. gays exist, don't be mean to 'em) OR discussion of homosexual practices OR full-on demonstrations, or what? And n't mean one-off stupidities like that conference in Massatoosis a couple years ago, I mean public school curricula that teach this stuff. What's out there, and where?
I find it difficult to present any cogent argument that teenagers, who are being prepared to go out into the world, should not at least be made aware of the existence of homosexuality and be taught that while many people find homosexuality abhorrent, there's no room in school for physical or verbal assaults upon fellow students who are homosexual or perceived to be (which is sometimes the case in schools - a kid isn't "out," and indeed may not be homosexual, but is labelled as such and targetted for predation by other students.
Grade schoolers are a different matter; not only is it inappropriate to teach sexuality to, say, kindergartners, but it's a diversion from the things that are really far more necessary in a primary school curriculum.
SW
"I guess I'm not 100% clear what exactly is being taught, and where:"
I can't give you a state-by-state rundown. But my research over the past ten years reveals the intents and goals of the GSLEN organization -- that much of their large budget, is directed at teaching children about gay sex and its mechanics, not just its existence. It is also directed at teaching the "normalization" of gay behavior, not just tolerance. They have succeeded to a greater degree in some states, such as California, than others, but the point is that their pressure tactics will continue to press for more information and younger children continually. Their goal is not just information, but indoctrination.
"I guess I'm not 100% clear what exactly is being taught, and where"
Here is GLSEN's state-by-state report:
http://www.glsen.org/cgi-bin/iowa/all/library/record/1687.html