This study examines estimates of the same or similar variables in the 1990-91 Schools and Staffing Survey (SASS) and the 1991-92 Teacher Followup Survey conducted by the U.S. Bureau of the Census for the National Center for Education Statistics. The SASS is a national survey of elementary and secondary schools, which consists of components surveying teacher supply and demand, school administrator characteristics, student and school characteristics, and teacher qualifications and characteristics. The Teacher Followup Survey, conducted a year after the SASS, uses a sample derived from the participants in the SASS Teacher Survey. Data from the Teacher Followup Survey allow for comparative analyses of public and private school teacher job satisfaction and movement within and out of the teaching profession. The SASS sample comprises approximately 13,200 schools and 65,200 public and private school teachers. This report, results of which are intended primarily for users of the 1990-91 SASS data sets, identifies the same or similar survey items across the SASS and Teacher Followup Survey and compares these items and estimates across national, state, and private schools. It also decomposes estimates to understand the source or sources of differences. Following an introduction, the chapters of this report concentrate on the variables identified as being common across the surveys: (1) public school enrollment; (2) teacher totals; (3) number of teachers by race/ethnicity; (4) teacher schooling and certification; (5) and teacher attrition. Tables presenting comparison results are found at the end of each chapter. A concluding chapter summarizes differences, which in general, differ only by small percentages, even though they often show statistical significance. An appendix provides the Statistical Analysis System computer programs used to analyze the SASS results. (Contains 2 figures, 26 tables, and 7 references.) (SLD)