Teachers in the Chicago south suburb of Evergreen Park went on strike last night cancelling school today for 150 teachers, 60 support staff members and more than 1,800 students. Teachers in the Evergreen Park school district say they are walking out over a school board plan to reduce health care benefits and link salary hikes to student test scores, among other issues.

The Chicago Tribune reports that teachers in the suburbs of Highland Park and Crystal Lake are also contemplating a strike.

Meanwhile, the Chicago Teachers Union, who suspended their strike two weeks ago, will have its members vote on ratifying a new collective bargaining contract today. Approval is likely.