Kidshealth.org

Kidshealth.org

This is such an excellent resource for everybody!  I learned about this website from my colleague Wendy, another school librarian.  There are distinct places here for teens, kids, and parents--and accurate answers to any and all questions about puberty, bodies, food & fitness, emotional well-being and lots of other health-related things.  It is easy to navigate around the site and find what you are looking for.  What is particularly great about using a website like Kidshealth.org is that if you are the kind of person who might feel shy or embarrassed about asking puberty-related questions or checking out health books at the library, you can find answers without talking to anyone.  Of course, most teachers and parents and other adults want to help answer those questions, but if you don't feel like asking it's nice to have a good website to go to.
In the section for teens, you'll find information about everything from gum disease, to dealing with feelings about being overweight, to food allergies, to smoking, to handling stress about going to school dances.  The site is current--I just found information about the disaster in Japan and tips on what to do to help--and the information is also non-judgmental.  For example, a tab on body piercing explains what it is, what to expect if you have it done, and health problems that sometimes result from piercings.  If you prefer to listen instead of reading the information, there is an audio feature available.  It's easy to get the information in Spanish, too.
In the part for kids, you can read about braces, feeling too short or tall, and find easy, healthy recipes to prepare.  The "Kids Dictionary of Medical Words" looks really helpful, as well as a section that explains (in kid language) some common health problems adults often suffer from.
Kidshealth.org is a very impressive, accessible collection of articles, videos, games and other resources all related to physical and mental health.  Check it out!