* Various schools within a school district: They might work at different elementary, middle, or high schools within the same district.
* Different classrooms within the same school: Even within a single school, they might teach different subjects or grade levels on different days.
* Charter schools or private schools: Substitute teachers may also work in schools outside of the public school system.
Essentially, a substitute teacher's workplace is any school where they are assigned to cover for an absent teacher. They don't have a single, permanent workplace.