National Endowment for the Humanities
Neh: Edsit Ement: The First American Party System: Events, Issues, and Positions
In this Curriculum Unit, students will consider "The First American Party System: Events, Issues, and Positions" in 3 Lessons. The unit also includes worksheets and other student materials that can be found under the resource tab.
Wikimedia
Wikipedia: Libertarian Party (United States)
Wikipedia offers a lengthy overview of the Libertarian Party in the United States. Good definitions, facts, and arguments about whether the Libertarian Party is on the right or left of the political spectrum.
Other
A Brief History of American Major Parties
A good, brief history of the two party system in the United States.
CNN
Cnn: Democratic Party History
CNN provides a brief account of Democratic party history from the party's origins in the Democratic-Republican party to the present, including information on the era preceding the Civil War.
Other
A Brief History of the Two Party System
This site is a web-article on the brief history of the two party system.
Gilder Lehrman Institute of American History
Gilder Lehrman Institute: History Now: Examining Antebellum Elections
[Free Registration/Login Required] This high school lesson plan has students look at data from the elections between 1824-1861 and the effect the two party system had on the outcomes.