An ongoing reference to exhibits, events, lectures, reenactments, ceremonies, and other tributes commemorating the significance of Lincoln's life and his presidency during this 200th-year anniversary.

How can you bring 21st-century teaching into curriculum you've already developed and use? AP U.S. History teacher Ron Gorr substituted online and in-person research and discussion for a quiz and a lecture.

Since 1870, a total of 123 African Americans have served as U.S. Representatives or Senators.