Wouldn't it be fun to teach a nutrition lesson wearing one of these cute Tee-shirts or aprons from foodtee.com? The caption under the apples is "choose me", the one under the berries says "berry good". They have lots of choices on the website.
Teen Survival Guide: Health Tips for On-the-Go Girls. This looks like an interesting booklet for girls, published by girlshealth.gov. The section on reproductive health is simple, clear, and informative. It can be downloaded in PDF format, or ordered for free with a phone call.
The girlshealth.gov website (a division of HHS) also has a lot of links to teacher resources on various health topics. Click here and then explore the link to classroom tools.