SaaS is a very good way to go about it, and we have got inquiries for 'mass signups' from a couple schools we talked to. We were hesitant because we thought it would result in a bunch of phantom accounts, but like you say, I think many organizations already try to achieve something similar.

You're spot on the mentor/recruiter difference...and on the road map is support for groups and orgs. Thank you so much for your feedback.