Other
Urban Debate Leagues: Learn to Debate
Wide, broad site offering a wealth of resources for beginning debaters. Includes links to videos (requiring RealPlayer). There is a link to the basics of argumentation as well.
Other
Grinnell College: Reblesky: Debate Guidelines
This set of debate guidelines includes information on debate format as well as preparing for a debate. It uses a computer science class debate prompt.
Other
Debate Central: Learn About Debating
This web site has debate information on how to debate, how to judge, how to coach, how to be a better speaker and how to research.