Federal Reserve Bank
American Currency: Demand and Interest Bearing Notes: Financing the Union
Brief overview of demand notes of the Union, commonly called "greenbacks." Gives a historical context for the notes and has many pictures of what they looked like. Includes an activity looking at Union soldier wages.
Federal Reserve Bank
Federal Reserve Bank of San Francisco: Civil War Money
Resource gives a history of money through the Civil War. It includes information about what influenced types of money to be made, Confederate currency, and Union currency.