Teachers and other K-12 education advocates have complained that Nevada's funding for K-12 education is pathetically low compared to the rest of the nation.They point to basic per pupil support from the state of just over $5,000 a year.But when tallying up exactly what the 17 school districts do spend per pupil each year, that's far from the whole story. For most districts, in fact, it's about half the story.A review of school district comprehensive financial statements for fiscal Year 2010 shows districts statewide spent $9,885 per pupil when all revenues are added to the state's basic support number.Total expenditures …