The following estimates in this document are key statistics about education reported early in the 1991-92 school year: (1) the numbers of students in membership, numbers of teachers, and numbers of high school graduates for public and private elementary and secondary schools; and (2) total revenues and expenditures for public elementary and secondary schools. The public school estimates consist of preliminary actual counts, estimates derived by the National Center for Education Statistics (NCES), and imputed values developed by the NCES. Total student membership is estimated to be 47.0 million students for the 1991-92 school year, with some 41.8 million in public schools, compared with 4.8 million students in private schools. Student membership has increased by 1.8 million since fall 1987. Students are taught by 2.4 million public school teachers and 355,000 private school teachers. About 2.3 million public school students and 234,000 private school students are expected to graduate from high school in the 1991-92 school year. Revenues for public elementary and secondary education in fiscal year 1991 are estimated to be $220.1 billion, rising to about $231.3 billion in 1992. The cost of public education is anticipated to be $5,097 per student in membership for the 1991-92 school year. Data are presented in 15 tables. Technical notes explain the data collection and estimation processes. (SLD)