Perhaps you've wondered why public school teachers can walk out on their students as a way to force school boards and parents to cave into union demands. Actually, not all states allow it, for obvious reasons. In Illinois the right to strike ultimately is responsible for Illinois' dire financial straits. Teachers' unions apparently are more willing to leave the children in the lurch than parents and school boards.
Illinois also has a history of teacher strikes, but given that the state legislature is controlled by union-friendly Democrats, analysts do not expect to see an anti-strike law anytime soon.