The United States spends about $11,000 each year, on average, to educate each public K-12 school student, according to the most recently available government information. That’s a 27% increase in inflation adjusted dollars from two decades before.
Public Education Finances 2014 (US Census Bureau): p. 11, Table 11: States Ranked According to Per Pupil Public Elementary-Secondary School System Finance Amounts: FY 2014 (Released June 2016)
NCES: Table 236.15. Current expenditures and current expenditures per pupil in public elementary and secondary schools 1989 – 1990 through 2025-26