Correct answers for Free Rice quiz items generate food donations paid for by sponsors, whose banners appear on the web page. The level of difficulty automatically adjusts up for correct and down for incorrect answers.
Though on one occasion an inappropriate banner appeared, the non-profit site owners had written, "We are quick and careful to remove inappropriate content, if it is reported to us via email at wfp.freerice@wfp.org with 'Report inappropriate content' ... in the subject line" (http://freerice.com/about/faq). So I reported that inappropriate banner.
There are English, French, Italian, and Spanish versions of the game on the same site, with more quiz categories for English than for the other languages. There also is a Korean version on a separate site:
Registration is separate for the two sites, but not necessary to play; it will enable you to track your contributions on one site or the other.
Reference
World Food Programme. (2014). Free Rice 2.0 [online game]. Retrieved
June 5, 2014, from http://freerice.com
[165 words]
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