CHICAGO (CBS)—More than 1,500 teaching and graduate assistants at UIC are without a contract and are going on strike for higher pay after the union failed to reach an agreement with university administrators.

Graduate workers will start picketing Tuesday morning around 9:30 a.m. They say they’re fed up with low pay, university fees and appointment policies.

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The UIC Graduate Employees Organization represents more than 1,500 teaching and graduate students.

The union met with administrators for the university Monday night for the 22nd time to negotiate a new contract. Union employees have been working without one since September 2018.

In a statement sent out Tuesday morning, UIC said administrators planned to meet with union representatives again on Friday and said classes would continue amid the strike period.

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“All members of the university community will be expected to meet for classes as usual,” the statement reads, in part. “During a strike, the university is committed to continuing normal operations to the fullest extent possible.”

Last month, a majority of union members voted to move forward with a strike.

The union says grad workers are living on the edge of poverty. They make as little as $18,000 per year despite some employees running classes of up to 60 undergraduate students.

They believe they deserve better because the university is doing well. Enrollment is at a record high and new construction projects are in development on campus.

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UIC has been contacted for comment.