This study evaluated turnover of special education teachers by providing national estimates of the numbers of special education teachers who (1) were retained by their school, (2) were reassigned to a different school within the district, (3) migrated to another district, or (4) left public school teaching. Numbers were drawn from the 1987-88 Schools and Staffing Survey and the 1988-89 Teacher Followup Survey of the National Center for Education Statistics. Parallel analyses were made for turnover of teachers in general education. In general the results indicated that teacher turnover at the school level was significantly higher for special education than for general education teachers (20 percent versus 13 percent), and that teachers in special education were significantly more likely to leave public school teaching than their general education counterparts (7.9 percent versus 5.8 percent). With respect to turnover, teachers of students with learning disabilities were less likely than other special education teachers to leave their schools, but more likely to do so than general education teachers. The advantages of quantifying each component of teacher turnover were discussed, as well as the implications of these and other findings for public policy related to teacher retention and supply in special education. (Author/DB)