Check out these websites
The N
The N provides tv shows just for teens. If you enjoy watching the shows on The N, then visit their official website where you can post your thoughts and opinions, read up on your favorite shows, and take fun quizzes.
SmartGirl
SmartGirl provides an online community for pre-teens and teens to express themselves and voice their opinions.
TeenInk.com
Magazine, blogs, book series and website written entirely by teens. An excellent resource for teen writers and artists.
Speak Up Press
This national art and literary journal features writing and art by teens around the world.