Classes will resume Monday in suburban Lake Forest, even if teachers there continue picketing.
Authorities on Friday said students must report. If the strike continues, volunteers will provide special educational prorgrams for the students.
The 150 teachers went on strike after contract talks broke off late Tuesday. The strike left about 1,700 students out of class.
The two sides met for a bargaining session Thursday, and the union's lead negotiator said both sides will continue to work toward a fair contract.
Teachers want an agreement on salary and benefits. They reportedly make an average of about $100,000 a year.
Meanwhile, Chicago Public School teachers look to be closing in on a deal.