Salary and expenditures are related, but not apples-to-apples. The first thing that popped to mind is healthcare. Here’s a reference link which mostly overlaps the above graph’s timeline:
Next would be administrative costs...we’d have to see if district salaries are counted and averaged into teacher expenditures...since it’s all about the children, and what it costs the public (taxes) to pay the teachers (and everyone who supports them within the educational system).
Salary and expenditures are related, but not apples-to-apples. The first thing that popped to mind is healthcare. Here’s a reference link which mostly overlaps the above graph’s timeline:
http://www.healthsystemtracker.org/wp-content/uploads/2014/11/Slide2.png
Next would be administrative costs...we’d have to see if district salaries are counted and averaged into teacher expenditures...since it’s all about the children, and what it costs the public (taxes) to pay the teachers (and everyone who supports them within the educational system).