Free online geodetective program for teaching earth history and physical earth science by the National Park Service. Activities written to encourage deductive and inductive reasoning through hands-on discovery learning.
DocsTeach | Searchable Teacher Resource | Primary Document Activities by National Archives
US website where students can learn facts, get ideas for activities, and take interactive quizzes on the American Revolution. This picture, for instance, shows a timeline of significant events leading up to and during the Revolution.