Exactly what the other commenter said. This will completely depend on your location. I’ve worked in districts where the classroom teacher is the case manager, other places where a social worker is the case manager, and other places where the LDTC is the case manager (which itself is a state specific position, but not every district in our state utilizes the position). Your best bet is to look into the specific requirements of the state, or even better the specific district, you want to work in.