About the Author

Martin Kelly is the About.com guide for American History and the author of the SparkNotes study note cards for the AP American History review. He taught social studies courses for nine years, supervised the development of online courses, and is currently supervising teachers with the Florida Virtual School.

Melissa Kelly is the author of "The Everything New Teacher Book" and the About.com guide to Secondary School Educators. She taught social studies for nine years, including AP U.S. History courses.