PBS
Pbs: The Lowdown: Poverty Trends: What Does It Mean to Be Poor in America?
Use math to learn about changes in US wealth distribution and poverty rate over time in this interactive from KQED. In the accompanying classroom activity, students interpret the graphs and consider how the poverty rate spike following...
Wikimedia
Wikipedia: Lorenz Curve
This website describes what a Lorenz curve is, and shows what it would look like graphically. A mathematical formula is also given.
Travel Document Systems
Tds: South Africa: Economy
Read about the improvements South Africa is making in its economy in its attempt to improve the lives of its citizens. Information is from the U.S. State Dept. Background Notes.