Select a small content channel appropriate to the learners and transfer it to the intended local device. Test access over the actual classroom network and verify that progress is recorded as expected. Plan how content updates, account administration, and backups will happen when regular internet connectivity is unavailable.
This is best suited to schools and programs with limited internet connectivity. Before committing a larger project, account for these trade-offs: content must be obtained and updated; device and local-network setup still matter.