The Detroit Federation of Teachers is suing the city's public school system on behalf of more than 400 teachers the union says were laid off improperly.
Detroit Public Schools used a new evaluation system this year, following changes to Michigan's teacher tenure law that allow districts to call back laid-off teachers without using seniority as the first factor.
The union says the system the district came up with is not fair or transparent. And Detroit Federation of Teachers President Keith Johnson says on top of that, the school system didn't even follow its own rules when it came time to decide who would be called back to work.
Johnson says the lawsuit seeks any remedy available under the law.
"That would include reinstatement, it could include punitive damages, because there are some teachers who have had their lives literally turned upside down."
The school district did not comment directly on the lawsuit. But in a statement, it says the evaluation system ensured the most highly effective teachers would be placed in every classroom.