Free Rice!

My English teacher told our class about this website that donates rice if you answer vocabulary questions correctly. It's called FreeRice. You are given a word and you have to choose the best definition out of 4 other words (multiple choice). For every word you define correctly, 20 grains of rice are donated to the United Nations to help fight world hunger. It says on the site that a total of about 17,461,100,870 grains of rice have been donated so far! You should join in too! You don't need to create and account or give them your e-mail address or anything, just go to the site and start donating. Plus, you're learning while donating. It's like killing two birds with one stone, haha.