Edwardsville, Ill (KSDK) -- It's the first day of school for Edwardsville students, but they may not be in classes for long.
Teachers and the school district must agree on a new contract or else the teachers may strike.
Teachers and their supporters did an informational picket on Monday and later spoke out at a school board meeting.
While the teachers are asking for a raise and the district is proposing a temporary freeze, teachers say this is more about class size. They're worried classes will continue to grow and teachers will not be given the resources or help to keep up.
The district said it has given the teacher's union it's best and final offer.
Teachers said they don't want overcrowded classrooms and they have rejected a pay freeze in the first year.
Both sides say they do not want a strike, but so far, there are no new talks scheduled.