Teachers in North Shore School District 112 in Highland Park have set a strike date for Oct. 16 after failing to reach an agreement with the school board during contract talks Thursday, the teachers union said.

Members of the North Shore Education Association's bargaining team were unhappy with the latest offer by the Board of Education, according to a union release.

Both sides have declined to discuss specifics about the negotiations, but a spokeswoman for the teachers has said raises are the primary issue.

The next bargaining session is scheduled for Wednesday. Teachers in the district have been working without a contract since Aug. 21.

In another suburban district where contracts talks have stumbled — Crystal Lake-based Prairie Grove Consolidated School District 46 — the teachers union released a statement this past week saying it "continues to do everything possible to avoid a strike," though its members have voted to authorize a walkout on an undetermined date if no deal is reached.

Talks are set to resume Thursday, with a federal mediator on hand, though the union said it's seeking to schedule a session sooner.

Meanwhile, in Lake Forest Community High School District 115, teachers and the school board have yet to give final approval to a tentative contract that ended a weeklong teachers strike last month. But ratification could come in a matter of days, officials said. No details of the new pact have been released.

jdanna@tribune.com