|Figure 31-1: Student/teacher ratios in regular public schools, by school level: School years 1990-91 through 2007-08|
NOTE: The student/teacher ratio is determined by dividing the total number of full-time-equivalent teachers into the total fall enrollment. Regular schools include all schools except special education schools, vocational schools, and alternative schools. Combined schools include both elementary and secondary grades. This analysis excludes schools that did not report both enrollment and teacher data. For more information on the Common Core of Data (CCD), see supplemental note 3.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Common Core of Data (CCD), "Public Elementary/Secondary School Universe Survey," 1990–91 through 2007–08.