For the second time in seven years, Chicago Public Schools teachers will be on strike starting Thursday, walking out of class, they say, in the name of better schools.

Gathered on the stage of the union hall on Wednesday, the Chicago Teachers Union said its delegates were in full support of moving forward with a strike. Delegates had already authorized the walkout and set a date so it would have taken a reversal to cancel the strike.

“We have not achieved what we need to bring justice and high quality schools to the children and teachers of Chicago,” said CTU President Jesse Sharkey. “We need to have the tools we need to do the job at our schools. We need pay and benefits that will give us dignity and respect. We are on strike until we can do better.”

Altogether, more than 30,000 workers will be on the picket lines. This includes 7,500 teacher aides, custodians and security guards who members of SEIU Local 73. SEIU said Wednesday evening it had rejected CPS’ contract offer and planned to strike on Thursday along with CTU.

Officials say schools will be open, with principals and other administrators supervising any children that need a place to go. They also are telling parents they can bring their children to libraries and some community organizations.

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