In case you haven't heard of it, Kiva is a website that connects people all over the world with microfinance institutions. Basically, a bunch of people who can spare $25 get together and finance small loans for people in developing countries, and then they are paid back (based on a pre-set schedule). It's an interesting project for students, it really shows that what to us seems like a small amount of money is life changing to people in other parts of the world. While browsing through the names of lenders to certain loans, I've noticed plenty of middle school, high school, and college classes that are buying loans. It's all very interesting.
Check it out if you have a chance. My first Kiva loan just closed out, so now I'm off to find another one :-)