Chicago charter school network seeks order to end strike

Educators with Acero charter schools strike outside the Veterans Memorial Charter School Campus, Tuesday, Dec. 4, 2018, in Chicago. Hundreds of teache

Educators with Acero charter schools strike outside the Veterans Memorial Charter School Campus, Tuesday, Dec. 4, 2018, in Chicago. Hundreds of teache

Educators with Acero charter schools strike outside the Veterans Memorial Charter School Campus, Tuesday, Dec. 4, 2018, in Chicago. Hundreds of teache

Educators with Acero charter schools strike outside the Veterans Memorial Charter School Campus, Tuesday, Dec. 4, 2018, in Chicago. Hundreds of teache

Educators with Acero charter schools strike outside Veterans Memorial Charter School Campus, Tuesday, Dec. 4, 2018, in Chicago. Hundreds of teachers h

Educators with Acero charter schools strike outside Veterans Memorial Charter School Campus, Tuesday, Dec. 4, 2018, in Chicago. Hundreds of teachers h

From left to right, Kathryn Schoedel, a teacher at Ziumbo Elementary School, Lindsay Anderson, a teacher at Torres Elementary school and Vanessa Cerf-

From left to right, Kathryn Schoedel, a teacher at Ziumbo Elementary School, Lindsay Anderson, a teacher at Torres Elementary school and Vanessa Cerf-

Charter school teachers including Vanessa Cerf-Nikolakakis, center, of Torres Elementary School, and other supporters walk the picket line outside the

Charter school teachers including Vanessa Cerf-Nikolakakis, center, of Torres Elementary School, and other supporters walk the picket line outside the

President of the Chicago Teachers Union Jesse Sharkey talks with members of the media as charter school teachers and their supporters walk the picket

President of the Chicago Teachers Union Jesse Sharkey talks with members of the media as charter school teachers and their supporters walk the picket

CHICAGO (AP) — A Chicago charter school network is seeking help in halting a teachers' strike for much of the past week.

The Chicago Tribune and Sun-Times report Acero filed complaints Friday with the Illinois Educational Labor Relations Board and National Labor Relations Board against the Chicago Teachers Union. The complaint filed in Cook County argues the strike is illegal because teachers didn't follow mediation or notice requirements.

Teachers went on strike Tuesday and classes were canceled for Acero's 15 schools and 7,500 predominantly Latino students. They are demanding smaller classes, more special education staff, salary increases and protections for students and families living in the country illegally.

Union officials say the walkout isn't illegal. They say it's the first strike at any of the privately run, taxpayer-funded schools in the U.S