На днях я нашла сайт в интернете - www.freerice.com. Особенность этого сайта в том, что отвечая правильно на вопрос в различных областях знаний, вы зарабатываете 10 рисинок, которые идут в голодающие регионы Африки.
Сайт полностью на английском языке, так что информацию о нем помещаю на английском:
About FreeRice

"FreeRice is a non-profit website run by the United Nations World Food Program. Our partner is the Berkman Center for Internet & Society at Harvard University.

FreeRice has two goals:

Provide education to everyone for free.
Help end world hunger by providing rice to hungry people for free.
This is made possible by the generosity of the sponsors who advertise on this site.

Whether you are CEO of a large corporation or a street child in a poor country, improving your education can improve your life. It is a great investment in yourself.

Perhaps even greater is the investment your donated rice makes in hungry human beings, enabling them to function and be productive. Somewhere in the world, a person is eating rice that you helped provide. Thank you."
For each answer you get right, they donate 10 grains of rice through the UN World Food Program to help end hunger.

Do I really make a difference by playing FreeRice?

"The rice you donate makes a huge difference to the person who receives it. According to the United Nations, about 25,000 people die each day from hunger or hunger-related causes, most of them children. Though 10 grains of rice may seem like a small amount, it is important to remember that while you are playing, so are thousands of other people at the same time. It is everyone together that makes the difference. Thanks to you, FreeRice has generated enough rice to feed millions of people since it started in October 2007."

How does playing the vocabulary game at FreeRice help me?

"Learning new vocabulary has tremendous benefits. It can help you:

Formulate your ideas better
Write better papers, emails and business letters
Speak more precisely and persuasively
Comprehend more of what you read
Read faster because you comprehend better
Get better grades in high school, college and graduate school
Score higher on tests like the SAT, GRE, LSAT and GMAT
Perform better at job interviews and conferences
Sell yourself, your services, and your products better
Be more effective and successful at your job
After you have done FreeRice for a while, you may notice an odd phenomenon. Words that you have never consciously used before will begin to pop into your head while you are speaking or writing. You will feel yourself using and knowing more words."

Besides, exept English you can choose next subjects:

ART
Famous Paintings

CHEMISTRY
Chemical Symbols (Basic)
Chemical Symbols (Full List)

ENGLISH
English Grammar
English Vocabulary

GEOGRAPHY
Identify Countries on the Map
World Capitals

LANGUAGE LEARNING
French
German
Italian
Spanish

MATH
Basic Math (Pre-Algebra)
Multiplication Table
Победим голод знаниями!!! Заходи на www.freerice.com!