The price of teacher attrition is high, not only financially, but also in terms of human and institutional costs. The inability to retain beginning teachers contributes significantly to teacher shortages. This study investigates the effect of the preparation program on teacher attrition. Attrition rates of elementary teacher graduates from two types of university teacher preparation programs--the professional development school program and the traditional university campus-based program--are quantitatively compared with respect to gender, ethnicity, academic performance, and site. Program type was found to have a significant effect on teacher attrition rates. Traditionally trained teachers had higher attrition rates than did those trained through PDS programs for all strata. Males were found to be exiting the teaching profession in greater numbers than females. All ethnic groups were found to be leaving in similar numbers as those in past studies, with the exception of African Americans, whose rate of attrition was lower. Finally, moderate differences in attrition rates were found among university sites. (Contains 3 tables and 4 figures.)