Chicago Public School children use the computers at Woodson Regional Library on September 10, 2012 in Chicago, Illinois. The library is one of 78 public libraries in the city that are serving as 'safe havens' for students who are not in school because of the teachers strike. More than 26,000 teachers and support staff hit the picket lines this morning after the Chicago Teachers Union failed to reach an agreement with the city on compensation, benefits and job security. With about 350,000 students, the Chicago school district is the third largest in the United States. (Photo by Scott Olson/Getty Images)

Classes have resumed in one Illinois school – without the teachers. Lake Forest High School, a suburb outside of Chicago, opened its doors yesterday morning despite an ongoing teacher strike, WMAQ reported.

The protests began last Wednesday, days after Chicago public school teachers went on strike.

The Lake Forest Community high school district issued a mandatory order to parents last Friday for students to return to school.

“Each day the strike progresses the adverse impact on our students increases. The Board’s primary goal remains the same – to serve our students,” the district stated in the order.

The school is using a temporary staff made up of about 140 substitute teachers, community volunteers and other support. The new staff made it possible for over 1,400 students to return to their classes. In addition to normal courses, the school will have guest speakers lead discussions on criminal justice and emotional well-being. LFHS Principal Jay Hoffman told the Chicago Tribune the plan was developed last week with the help of the community and students.

Lake Forest plans to stay in session through the strike.

In another Board of Education update, the district said it decided to re-open its doors because of the community’s urging. “Our parents expect us to open school,” the statement said.

Today marks the seventh day Chicago teachers have been on strike. Negotiations between Chicago Public Schools and the Chicago Teachers Union are still in discussion.