Data from TFS are used for a variety of purposes by Congress, state education departments, federal agencies, private school associations, teacher associations, and educational organizations. TFS can be used to research issues related to teacher turnover. Leavers, movers, and stayers can be profiled and compared in terms of teaching qualifications, working conditions, attitudes toward teaching, job satisfaction, salaries, benefits, and other incentives and disincentives for remaining in or leaving the teaching profession. TFS also provides a measure of national teacher attrition in the various fields and updates information on the education, other training, and career paths of teachers. In addition, sampled teachers can be linked to SASS data to determine relationships between local district and school policies and practices, teacher characteristics, and teacher attrition and retention.