Emma Brown:

But in other states, the Great Recession sparked a spike in the growth of four-day weeks that has since slowed, according to data collected by The Washington Post. Oklahoma stands out for the velocity with which districts have turned to a shorter school week in the past several years, one of the most visible signs of a budget crisis that has also shuttered rural hospitals, led to overcrowded prisons and forced state troopers to abide by a 100-mile daily driving limit.

Democrats helped pass bipartisan income tax cuts from 2004 to 2008. Republicans — who have controlled the legislature since 2009 and governorship since 2011 — have cut income taxes further and also significantly lowered taxes on oil and gas production.

“The problems facing Oklahoma are our own doing. There’s not some outside force that is causing our schools not to be able to stay open,” said state Sen. John Sparks, the chamber’s top Democrat. “These are all the result of a bad public policy and a lack of public-sector investment.”

But Gov. Mary Fallin (R) said a downturn in the energy sector and a decreasing sales tax revenue have led to several “very difficult budget years.”

Madison is rather different, spending far more than most, around $18k per student.