KANSAS CITY, Kan. (AP) — Parents from the Shawnee Mission School District are asking the U.S. Supreme Court to consider their case challenging a state cap on the amount of local property tax money that the district can spend on education.

The parents filed a lawsuit in 2010 arguing that the state could not limit local school district funding because it creates a new inequality that punishes school districts.

The Legislature put the cap in place to help equalize economic disparities among Kansas’ 286 school districts.

In June, the U.S. Appeals Court in Denver ruled that the federal court couldn’t override the state’s funding plan. The parents are now asking the U.S. Supreme Court to take up the case. The court’s decision could come early this month.