With an educational system made up of public school districts and independent private institutions, Oklahoma had 638,817 students enrolled in 1,845 public primary, secondary, and vocational schools in 533 school districts as of 2008[update]. Oklahoma has the highest enrollment of Native American students in the nation with 126,078 students in the 2009-10 school year. Ranked near the bottom of states in expenditures per student, Oklahoma spent $7,755 for each student in 2008, 47th in the nation, though its growth of total education expenditures between 1992 and 2002 ranked 22nd.

How many students were in Oklahoma's public schools in 2008?