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Multi-tasking takes on a whole new meaning at this cool, charitable
website. "Free Rice", a sister site of Poverty.Com, allows people to
simultaneously sharpen their English vocabulary while helping to end world
hunger.
Take the multiple-choice Vocabulary Quiz on FreeRice.Com to immediately
begin sharpening your mind and helping those in need. For every single
word that you get right, the website donates 10 grains of rice to the
United Nations World Food Program!
http://www.freerice.com/