I wanted to introduce the students to this as well. So to start the discussion of xenoestrogens in class I would show a documentary by the BBC called the Estrogen Effect. The video basically makes you say "Oh my god I'm swimming in a sea of estrogens and I'm doomed to live the life of a hermaphrodite."
It's a very reactionary film that probably goes overboard on several issues, but it puts the idea of what xenoestrogens are in your head and the potential dangers of them to you and the environment. A lot of time folks just don't know about these dangers.