Illinois law gives educational employees the legal right to refuse to do work in place of employees who are on strike. The legal term for this right is “mutual aid and protection”. So long as you are working in concert with at least one other employee, you needn’t do anything outside your normal job duties. And it doesn’t matter whether you’re in the union or not, or even you are in job classification represented by a union or not–so long as you’re not classified as “executive/managerial” staff. You can just say no. Details are in the document embedded below. This document has been vetted by the IEA legal staff. They are not ones to go out on a limb.