Check out these websites, some you should use for fun, some for yourself, and some for your classes:
Interested in publishing? Check out this site for excellent resources and guidelines!
Teen Ink (a web-based magazine by teens) http://www.teenink.com/
Plinky (get inspired – You have answers) http://www.plinky.com/
LifeHacker (tips and tools to get you through everyday life and beyond) http://lifehacker.com/
Words Per Minute Typing Test: http://www.typeonline.co.uk/lesson1.html
Hippo Campus: http://hippocampus.org
Royalty Free Clip Art Images: http://www.clipartpal.com/