Teen Health

Medline Plus - a consumer health information website developed by the National Library of Medicine is an excellent resource for information providing a medical dictionary, encyclopedia, information on diseases and conditions, drugs and supplements, easy-to-read materials, surgery videos, and materials in other languages. 

KidsHealth (Includes drug info.)

TeensHealth: Sexual Health

BAM! Body and Mind - Diseases, Food & Nutrition, Physical Activity, Your Safety, Your Life, Your Body