Want to help feed the hungry while improving your vocabulary skills? Answer multiple-choice vocabulary questions on FreeRice.com and they will donate 20 grains of rice to those in need for every question you get right. The rice is paid for by advertisers and is distributed by the United Nations World Food Program.
As of yesterday, 16,618,642,590 grains of rice had been donated.
Depending on how well you answer the questions, you will move up or down levels. The highest level is 55. According to the site, it is rare for people to get higher than 48 without cheating.
What a great idea – a chance to improve you vocabulary while doing something nice for the world!