Here are some recommended websites.
Cool Math Games– For nostalgic purposes. Mostly for Papa’s Pizzeria.
Epic Reads — Book related stuff aimed at teens.
Polygon— Articles about video games, movies, comics, tv shows and more! Check out their YouTube channel too!
TED: More than just speeches, TEDTalks are great ways to learn about presenting your ideas to a crowd, as well as learning about just about anything from design to engineering from many different expert perspectives.
Teen Ink — Dedicated entirely to teenage writing, art, photos, and forums.
TeenSpeak— A blog about teen issues written by teens and staff members of the Center for Young Women’s Health