CHICAGO (FOX 32 News) -
Teachers in two suburban school districts other than District 124 are also threatening to strike Tuesday.
Teachers in Highland Park's North Shore School District 112 filed a formal intent-to-strike notice, on Friday.
They could go on strike as early as next week.
Teachers in Crystal Lake's Prairie Grove Consolidated District 46 took a strike vote, but are trying to avoid walking out.
Their talks resume next week.