Integrated sample survey of public and private schools, school districts, and principals and teachers. The 2000-01 Teacher Follow-up Survey (TFS) is available through DSS. For comparisons between the Integrated Postsecondary Education Data System, Common Core of Data, Schools and Staffing Survey, and the Private School Universe Survey see the comparison chart. Also see the NCES Bibliography for literature that has used this data. The newer data is available through PowerStats directly through the NCES. After 2011, changed name to National Teacher and Principal Survey (NTPS).