What wasn't working
You don't get to catch up on the start of term. The rooms are empty in August and full in September, and a machine missing the right version of a piece of software doesn't hold up one user: it holds up a whole class.
A school doesn't have a fleet, it has rooms: identical machines that all have to start up together, with the same software, on the first day of term. And students who move from one workstation to the next with nothing following them.