• The US Constitution – Chapters 14, 15 and 16

• U.S. History: Pre-Columbian to the New Millenium
  Recommended website; 60 chapters

• Presidential Elections 
  History Channel. Videos, pictures, speeches.

• HippoCampus.org
  U.S. History Before 1877. Recommended website.

• Khan Academy: U.S. History
  Learning sequences, very well structured. 

• Digital History at the University of Houston
  Great interactive website. 

• A Biography of America
  Annenberg Learner. Well-elaborated resources.