Teachers in West Chicago School District 33 could go on strike Monday.

Negotiations between teachers and the school board broke off Friday night without a deal. The teachers filed an intent to strike last month. The two sides continue to disagree on several issues including:  health insurance costs, class sizes, salaries,  and teacher workdays.

A walk-out is unlikely to happen before a union meeting on Wednesday, according to a Union Rep.

A strike would affect 4,000 students from preschool to middle school.