Public education in the United States is a joint enterprise of federal, state, and local government. This report presents public school data from the 50 states and the District of Colombia in order to show the extent to which national, state, and local governments commit resources to education. The data cover three general areas: (1) public school enrollment and participation; (2) employment and compensation for personnel; and (3) finances. Because the statewide totals and averages may not reflect the varying conditions that exist among school districts and schools within the state, the information provided is meant only to provide a broad assessment of trends in staff salaries, sources of school funding, and levels of educational expenditures. Significant developments in public school statistics include an increase in student enrollment by nearly 540,000 pupils from 1989-90 to 1990-91, and a consequent increase in the number of public school teachers by over 43,000 from 1989-90 to 1990-91. State education agencies expect the average classroom teacher salary to increase by 5.4 percent over 1989-90 (from $31,331 to $33,015). Expenditure per student increased by 5.2 percent (to $5,208) in 1990-91. The largest share of public school financial support continues to be provided by state governments, while for 1990-91, the federal government's contribution to public elementary and secondary school revenues continues to diminish. (Glossary appended) (LAP)