Freerice.com

If you are not familiar with http://freerice.com you should check it out. It is a non-profit website which is run by the United Nations World Food Programme and donates 10 grains of rice for every answer you get correct! There are many subjects you can choose from. These include art, chemistry, language learning, English, geography, and math. It's a great site and VERY worthwhile. For just a few minutes a day, not only are you educating yourself.... but you are helping to end hunger throughout the world.