When in doubt, find a TED talk! The bottom line is talking about sex in front of angst-ridden teens is never going to be easy if you have not first established a personal level of comfort with the subject. Here's a quick 101 on how to lose the embarrassment and focus on the importance of being informed.
This a wonderful piece on what makes sex ed different for boys vs. girls and how we can be most sensitive to the issue of gender during this learning. It also provides some really candid and helpful questions around the topic to ignite discussion and promote honesty.
You will find some interesting history in this book around the role of education in family life and particularly how, from the beginning, teachers have been enlisted to assist in the "problems of parenthood." Understanding why schools are expected to teach this curriculum and how it has developed over the years is an eye opener.
Old fashioned or not, some people say class discussions about sex are unnecessary, as abstinence is the best option. Here are some concrete references as to why we must support sex ed at school and keep such programs effective and realistic.
One more serious educational approach to sex ed can be found here. For some of us, grasping the curriculum is the best place to start. And consequently, there are indeed standards associated with this educational piece. Having these under your belt before stepping in front of students can't be a bad idea.
Okay, enough discussion already--let's get down to brass tacks…how do we TEACH it? This is a lengthy and specific guide for precisely this purpose. You certainly wouldn't throw yourself out of an airplane without a parachute and that's precisely why you should read this primer for new teachers and seasoned vets.
If you are curious how sex education looks from state to state, this is a brilliant piece for you. If you think the Common Core is controversial, take a look at the discrepancies between states on this provocative issue. Clarifying the guidelines of your state is certainly a start, but assessing the best way to maneuver around the system as a teacher is imperative to success.