Does it have to be ADE2.0. I found with ADE1.7.2 that merely having the executable around was enough for it to work.
Do you need ADE because you want to read DRM books?
If not, it will probably be easier to roll out a simpler bit of code (Calibre, for example).
If you do want to use DRM books the difficult part will probably not be the installation, but the registration with an AdobeID.
Typically, only up to 6 devices can share an AdobeID.
Schools may well have special status.
I doubt you will find out from normal adobe service (such as Live Chat http://www.adobe.com/support/chat/ivrchat.html )
though with luck they could point you in the right direction for who you should contact.