The Center on Budget and Policy Priorities has a lengthy article on state public school spending since the Great Recession. Not a pretty picture. Washington state comes out - barely - above in most categories but I suspect that is thanks to the Washington State Supreme Court and McCleary.
Lots of graphs to dive into, pretty meaty insights here.
Also, related to funding, is this article from SCOPE (Stanford Center for Opportunity Policy in Education), How Money Makes a Difference: The Effects of School Finance Reforms on Outcomes for Low Income Students. It's from May 2014 but ties in nicely here.
In response to large within-state differences in per-pupil spending
across wealthy and poor districts, state supreme courts overturned
school finance systems in 28 states between 1971 and 2010, and many
states have implemented legislative reforms that led to important
changes in public education funding. These school finance reforms caused
some of the largest changes in the structure of K–12 education spending
in United States history.
results reveal that increases in per-pupil spending, induced by
court-mandated school finance reforms, led to significant increases in
the likelihood of high school graduation and educational attainment for
poor children, and thereby narrowed adult socioeconomic attainment
differences between those raised in poor and affluent families.