Is this the case in your district? We used to have teacher requests, but now, it is no, only the principal can request for long term or special situations. The subbing is scheduled by rotation, which I am still not clear what that means. I know that, to me, it means not working as much as I suspect that other subs do. If a teacher likes a sub and wants that sub to be with her students, why not be able to request this? Who knows better than the teacher? Not the district scheduler... How does it work in your district?