Prepared at Pennsylvania State University
Mid-Atlantic Center for Mathematics Teaching and Learning
18 June 2005 – Rose Mary Zbiek and M. Kathleen Heid

Edited at University of Georgia
Center for Proficiency in Teaching Mathematics
1 July 2006 -- Ryan Fox
25 July 2006 -- Ryan Fox
01 August 2006 -- Ryan Fox

Edited at Pennsylvania State University
Mid-Atlantic Center for Mathematics Teaching and Learning
06 February 2007 – M. Kathleen Heid

Edited Cross-Site
12 April 2007 - Kelly Edenfield, Jeremy Kilpatrick, Evan McClintock, Heather
Godine, and Rose Mary Zbiek

Edited at University of Georgia
Center for Proficiency in Mathematics Teaching
04 October 2007 – Ryan Fox and Brian Gleason