FAQs: What Chicago teachers should know before going on strike FAQs: What Chicago teachers should know before going on strike Chicago Teachers Union is poised to go on strike for the fourth time in nine years. Here’s what Chicago Public Schools teachers need to know before joining a strike. Chicago Public Schools teachers are facing a weighty decision: honor the potentially illegal strike and face discipline by the school district, or report to school and face discipline by the Chicago Teachers Union. Here are answers to commonly asked questions to guide teachers in making the decision that is best for them.