The Teacher Follow-up Survey (TFS) is sponsored by the National Center for Education Statistics (NCES) on behalf of the U.S. Department of Education and is conducted by the U.S. Census Bureau. TFS is a follow-up survey of selected elementary and secondary school teachers who participated in the Schools and Staffing Survey (SASS). SASS is the largest, most extensive survey of K-12 school districts, schools, teachers, and administrators in the United States today. It provides extensive data on the characteristics and qualifications of teachers and principals, teacher hiring practices, professional development, class size, and other conditions in schools across the nation. TFS focuses on a sample of teachers who participated in SASS, including both teachers who left and teachers who remained in the K-12 teaching profession. This report covers all phases of the Teacher Follow-up Survey (TFS), from survey planning through data file availability. The TFS determines how many teachers remained at the same school, moved to another school, or left the profession in the year following the Schools and Staffing Survey (SASS) administration. This report contains chapters on preparation for the 2008-09 TFS, frame creation and sample selection procedures, data collection, response rates, data processing, imputation procedures, weighting and variance estimation, a review of the quality of TFS data, structure of TFS data files and information on merging data files, and user notes and cautions. Appended are: (1) Key Terms for TFS; (2) Questionnaire Availability; (3) First Cognitive Testing of TFS Items: Summary of Findings and Recommendations; (4) Second Cognitive Testing of TFS Items: Summary of Findings and Recommendations; (5) Teacher Status Form (Form TFS-1); (6) Results of the Unit Nonresponse Bias Analysis; (7) Quality Assurance for Keying and Mailout Operations; (8) Changes Made to Variables During the Consistency and Logic Edits, by Data File; (9) Imputation Changes to Variables, by Data File; (10) Weighting Adjustment Cells; (11) Evaluation of an Alternative Nonresponse Adjustment Method; (12) Frame and Created Variables; and (13) Crosswalk Among Items in the 2000-01, 2004-05, and 2008-09 TFS and With the 2007-08 SASS. (Contains 40 tables and 14 exhibits.)