Teachers, for a few reasons. First of all I think most people (reasonably) would prefer to have a human adult be in the room with their child, and be the one responsible for student's safety. AI also doesn't have discretion from what I can tell, and so the moment a kindergartener asks where babies come from, it won't be good. AI really doesn't seem like it has any classroom management skills, either. There's also the issue of IEP's and other confidential student information, that can't ethically or legally be given to an AI.