W.r.t. learners taking Kolibri home via Kolibri Android app -
IMO, content should be limited to what the coaches want them to be exposed to at any given time.
The learners may have complete control to share / propagate it further unless the coach wants to restrict sharing of the same to ensure learners remain focussed with what has been assigned as per their learning tracks or if content licensing is a hindrance.
Not sure if there are plans or feasibility of a coach / admin app separate from a learner centric app as coach app will need many more features where a setup lacks a server.
It will definitely be a boon for places where deploying a server may be difficult/impossible due to electricity/power constraints but at the same time there could be solar powered charging stations for Android tablets.
Once a set of learning resources are synced to a single tablet via an internet or offline server connection, the same may be peer synced to the rest of the tablets.
To start with, the exercises and progress of the learners must be synced back to the coach’s device/server.
So these are the first thoughts.