Build Your Vocabulary and Feed the World, 7-12

http://freerice.com
Freerice.com is a vocabulary quiz Web site that builds students’ vocabulary and allows them to contribute to the fight against world hunger. It is a custom database containing thousands of words at varying degrees of difficulty. There are words appropriate for students just learning English and words that will challenge advanced placement students. The FreeRice Web site automatically adjusts levels to keep students at the upper level of their vocabulary range. For each correct definition, FreeRice donates 20 grains of rice to the United Nations’ World Food Program (WFP). Billions of grains of rice have been won for the WFP so far, which is enough to feed 200,000 people for one day.