I decided that it would be a bit easier to digest to do the chart by individual subjects and use points rather than percentages of a standard deviation and combined tests as an axis. Also revenue per pupil was easier to find than expenditures. So what you see up there is a first crack at 4th grade reading between 1998 and 2013. No shock- money is still not the answer (yes I am looking right at you New York and Wyoming).
Note Wisconsin’s spending growth combined with much lower than average academic performance.