The purpose of this paper is to characterize the choice made by retired professional school personnel in Pennsylvania to return to work in public education. This paper builds on earlier studies of the market for teachers and administrators in Pennsylvania. In this paper we describe retiring teachers, administrators and coordinators as "retirees," and describe such persons who return to work in public education post-retirement as "returnees." We find over the period 1984-2005 that the decision to return to public school employment after retiring is relatively rare. The overall return rate, the percentage of retirees in a given year who return later, varied between 0.4% and 2.8%. As a group, these returnees tended to be more highly educated, and more often administrators, retired about 9 years earlier than retirees who did not return, earned about $1,300 less in inflation-adjusted salary compared to retirees who did not return, and worked about 8 to 9 years less at time of retirement. More than 1/3 of returnees went back to work in a district other than the one they retired at, and more than 1/2 went back to work in a different school than the one they retired at. However, only 10% returned to a different Metropolitan Statistical Area than the one they retired at. In choosing where to return to, returnees showed a statistically significant preference for working in districts and schools that scored higher on Pennsylvania standardized tests than the districts and schools where they retired at. Such chosen districts were substantially less poor, and more white as well. (Contains 12 tables, 17 figures and 8 footnotes.)