Free Rice

>> Freerice
I’ve always been keen on sites which offer innovative ways to support charities; One of my first ever selections on Website of The Day was The Hunger Site, which asks visitors to click a button on the site in order to generate a donation of a cup of food to feed a starving person. Many similar sites have sprung up since the launch of the Huger Site in 1999, but Freerice.com is just 3 months old and has already had more impact than most click-to-donate sites.
Rather than just a click-to-donate model, Freerice offers a simple game to improve your vocabulary. For each multiple choice question you get right, site sponsors donate 20 grains of rice to the UN World Food Program. In 3 months the site has already generated 13,388,082,990 grains of rice. The game automatically adjusts to your own vocabulary knowledge making it addictive as well as highly worthwhile.