(KMOV.com) -- Teachers in the Mount Olive School District in Illinois are officially on strike.
Teachers went on strike Monday morning in Mount Olive School District No. 5 in Macoupin County. The town is 50 miles south of Springfield. The teachers' union and school district couldn't agree on a new three-year contract.
Teachers approved a strike last week. The contract expired at the end of the 2012-2013 school year.
The Associated Press contributed to this report.