Teen Ink
http://www.teenink.com/
This is a very highly regarded literary magazine written for and by teenagers. TONS of resources for contests, tips, interviews, essays, and more. Click the "resources" link on the left for lots of writing help.


Funbrain.com
http://www.funbrain.com/grammar/index.html

Grammar Gorilla is a simple but helpful game that allows you to practice identifying parts of speech. (Try the advanced level).
Also, you can do MadLibs on this site:
http://www.funbrain.com/brain/ReadingBrain/ReadingBrain.html


Prepositions Basketball
http://www.marks-english-school.com/games/b_prepmed.html
Another review game to help identify this difficult part of speech.


Ninja Words

http://ninjawords.com/
A really cool dictionary--looks up words fast and keeps track of your searches.

 

New York Times Crossword

http://learning.blogs.nytimes.com/student-crossword-archive/?_r=0

Scroll down for a selection of several different crossword puzzles

 

Free Rice

http://freerice.com/#/english-vocabulary/1447

Vocabulary Review game AND a good cause!