I wanted to let you guys know about freerice.com, a brilliant and very addictive vocabulary-building website that donates rice to the U.N. World Food Program based on your performance.
For each answer you get right, they donate 20 grains of rice to the United Nations World Food Program. I know it doesn't sound like a lot, but the game is so addictive that by the time you're done you will have provided enough free rice to feed a small country.
Tis' the season for doing kind things for others, and what better way than helping fight world hunger playing a game and learning new words? Please check it out, and pass along the Free Rice URL to others. Enjoy!