Dan Kleinfelter received his A.S. in Mathematics from Grossmont College, and his B.A. and M.A. in Mathematics from San Diego State University. Prior to coming to COD, he taught part time at Grossmont College from 2001 to 2005, and San Diego Mesa College from 2003 to 2005. Also, Dan was a Lecturer in the Mathematics department at San Diego State University from 2001 to 2005.