It was a pretty hush-hush topic, especially in the fourth grade. Rather than relay the information to us through a living breathing teacher, the school chose to show us a film about it. Necessity is more like it. We watched more films in sixth grade, during another session on human development, with more films and awkward discussion afterwards. Even the inquires that turned up in the supposedly anonymous question box seemed forced and uncomfortable.
Films seem to be the way to go.
It was easier on both the teachers and the students. A friend of mine said she did not want her children to learn about homosexuality from watching a TV show. I wondered why not. After all, that's how kids are used to learning. It's the same concept as the film projector, but simply more high-tech.