It's not just schools - libraries are often affected as well; such is the case where I work. A 10-year .88 mill was approved by voters in 2004. A couple years later the bottom drops out of the housing market and correspondingly the property tax base drops as well, so that the .88 that is levied is now bringing in far less than it was in 2004, with no way to change it until this year. The property tax base (in this area) still hasn't recovered sufficiently, meaning we have to approach the voters with a higher millage value just to get the same funding we had 10 years ago. Crazy.