The largest teacher's union in Kansas filed a lawsuit Monday against the state over the school finance bill. It says the bill violates the Kansas constitution.

According to the press release from the Kansas National Education Association, the lawsuit has nothing to do with the money the bill provides. Instead it deals with extra amendments added to the bill, specifically the one that took away a teacher's due process rights.

The teacher's union turned in its legal challenge to the Shawnee County District Court.

"We believe the petition stands on its own ground," said KNEA General Counsel David Schauner. "We think there is good support for this petition, we think this is the clearest early course to take in regard to 2506."

Schauner is talking about House Bill 2506, the school finance plan passed by lawmakers to end the session. It increased the money to Kansas schools, but included other amendments.

Those add-ons drew hundreds of teachers to the statehouse in April. All wore red shirts to show their solidarity against the bill.

Months later the union is still against the bill, but it worries the amendment that took away due process hearings will put Kansas teachers at risk of being fired without cause.

"The process we have had in place for more than 40 years has worked well and provided reasonable protection job security for teachers who have done a good job and we believe thats a critical component for continuing to provide a quality education," Schauner said.

Schauner believes the school finance bill violates Article 2, Section 16 of the Kansas Constitution which reads "no bill shall contain more than one subject"

Governor Sam Brownback sent out a statement about the lawsuit Monday afternoon. In it he says he is concerned the lawsuit "may cast doubt on, or unwittingly endanger, school funding just as classrooms are convening all across Kansas."