I just learned about this addicting site: http://freerice.com/index.php
Test your vocabulary skills by choosing the correct definition for certain words, and for each correct answer, 20 grains of rice are donated to the UN World Food Program to end hunger.
The site also brings to mind of one of our favorite children's book, the gorgeously illustrated One Grain of Rice: a Mathmatical Folktale by Demi. Through a story about a clever girl who outsmarts a greedy Raja and saves her community from starving, the book shows you how quickly small numbers can compound.
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