Washington Post: school funding at the federal, state and local levels increased between the 1980s and 2019

See The one education reform that would really help? Giving public schools more money. by Robert C. Pianta, dean of the University of Virginia Curry School of Education and Human Development.

Here is the correction they issued due to work by Corey A. DeAngelis.

"Correction: An earlier version of this piece stated that, adjusting for constant dollars, public funding for schools had decreased since the late 1980s. This is not the case. In fact, Washington Post: school funding at the federal, state and local levels increased between the 1980s and 2019."