Prepared at Pennsylvania State University
Mid-Atlantic Center for Mathematics Teaching and Learning
01 June 2005 – Rose Mary Zbiek

Edited at University of Georgia
Center for Proficiency in Teaching Mathematics
21 February 2007 – Eileen Murray

Edited at Pennsylvania State University
22 October 2008 – Heather Godine, Maureen Grady, and Svetlana Konnova
7 September 2009 – M. Kathleen Heid