A thirteen-slide presentation introducing the structure of the U.S. legal system. Notes for every slide are included. Topics include federalism, the primary sources of law - the Constitution, statutes, cases - and the structure and roles of each level of court in the federal and state system. Pennsylvania is the state used as an example, but it can be easily customized to any state. This introductory presentation cues up the subsequent presentations on case law, statutory law, and hierarchy of authority.