The Chicago Teachers' Union on Monday said the district offered no guaranteed funds to pay for what it was offering the union and that there was lack of trust between union members and the school district.
An agreement would avert a teachers' union strike in Chicago, the nation's third largest school district.
The lawsuit is the latest volley in a frenzied legal battle between teachers and the leadership of the troubled state-run school district.
New data from the National Center for Education Statistics show that per-pupil spending by districts, when adjusted for inflation, was lower in fiscal year 2013 than in 2012.
Susan Jordan, the principal of Amy Beverland Elementary School, allegedly pushed several students out of the way before she was struck and killed by a bus outside of her school.
Michigan Gov. Rick Snyder's proposal would offer comprehensive benefits to all children and young adults who may have come into contact with lead in the water
The four companies announced that they will donate up to 6.5 million bottles of water to Flint schools for the rest of the calendar year as the city continues to deal with the fallout of lead-contaminated tap water.
Many Detroit teachers say they have no other way to force action as the district spirals into financial insolvency.
The New York Department of Education has asked the American Institutes for Research to recalculate student growth scores for all principals in grades 9-12.
News of 227 layoffs follows a proposal from Illinois Gov. Bruce Rauner to take over the financially strapped school system.