How to setup iPads to be shared by multiple users?
iPads, by their nature are single user devices. One could go on and on about why that is or is not a good thing. But the fact remains that currently iOS does not offer multiple logins, like you can get on any Windows PC, or any Macintosh.

Apple does offer Apple School Manager that may give you some or most of what you are looking for. Perhaps someone with actual familiarity with this program could chime in or provide a more complete answer, but that link should at least get you started.