Discover some of the deep questions that scientists and philosophers ask about time and some of the ideas that emerge from each one.

Informative website focussing on American history from the Colonial period to present-day. Many on-line exhibits include timelines, photographs and famous quotes.

In this lesson plan, students examine primary source materials to investigate how ideas change and evolve over time and what impact past ideas have on people's perceptions of the present, or how the present may be perceived at some...