I disagree entirely. Just because you keep somebody away from something doesn't mean you make them believe its dirty or disgusting. I was raised with a very healthy awareness of sex. I knew what it was, I knew what the positives and negatives were from a biological standpoint (why people liked it and what it could do to you if you were irresponsible about it), and I was also kept away from it because my parents were very traditional. Am I fucked up? No. I had my little flings with girls in high school and college, played around here and there, and generally got to know the landscape of that side of life well enough, but I also remained (only in the most technical sense of course) a virgin until I got married. Had I treated it like recreation, I guarantee you there'd be no way that I'd have the willpower to deal with the sexual problems I have in my marriage now due to my wife's condition, just as I can pretty much guarantee few to none of you guys would be able to deal with that sort of thing in a relationship.
Do I think the film would be appropriate for a young girl? Not a chance in hell. And even if somebody felt that maybe it was, what fucking place is it for a teacher to show that? No, I'm sorry, but a teacher's place is to teach a curriculum, not indoctrinate kids with whatever their own personal views on something happen to be. While its true that something positive like what scott said could never happen in school these days, I don't think it's supposed to. If people were reasonable and could raise their kids there'd be no need in the first place. But people don't, so they constantly look outward for others to teach their kids everything that *they* should be teaching them. Do I think she deserves to be sued? Yes, in this case I do. Not that I agree with our legal system or the way it operates most of the time, nor with the concept of just handing money to people for everything, but I do think the teacher deserves punishment for being an egomaniac who believes her own concepts are so far above those of the parents that have entrusted their children to her.
It used to be that teachers could do more because they shared the same values as the parents most of the time. The country was much more even-keeled, much more unified in terms of what the general populace thought was good and should be taught to kids. Now we don't have that at all. We have extreme division over fundamental principles based on absolute, foundation-level disagreement on what is right and wrong. Now, the teachers only place is to teach kids math, how to spell, and then to shut the fuck up. It's a side effect of everything else happening in the world, and while it's a shame, it's a hard fact of the division we live with.
I'm more or less with Pug on the subject. Say what you like about homosexuality, but the base issue is really that a movie like this just doesn't belong in a classroom, gay cowboys or otherwise. Were I a parent, I'd be demanding her head. Does it mean the kid is going to be fucked up for life just because she saw this stuff? No, not necessarily, but it was never the teacher's place to show it.