Every station runs a write filter. During a lesson the machine behaves normally, but its changes are held in memory instead of being written to disk. At logout or reboot that layer is thrown away and the station returns to the exact golden image the teacher signed off. The next child sits down to a clean build in under thirty seconds, not a stranger's leftovers. When the image itself needs to change, the whole room rebuilds over the network. Wake-on-LAN powers the stations overnight, they boot to a small imaging appliance in the cabinet, and one golden image is sent to every seat at once by multicast. A thirty-two seat room is done in about twenty minutes, whether it holds five machines or fifty. Nothing is touched desk by desk. One image, one room, no weekend.

The teacher signs in at the front and sees a live grid of every screen in the room, all thirty-two of them, refreshing a few times a second. One look tells you who is on task and who has wandered off to a game. One click blanks every screen and locks every keyboard when it's time to look at the front. One click puts the teacher's own screen on all thirty seats for a demo. One click sends a website, a file or a login page to the whole room, so a lesson starts on the same page instead of thirty children mistyping an address. When a child is stuck, the teacher opens that one seat, watches it and takes control to show them, with a banner on screen so the pupil always knows the teacher is looking.

Every request from the room passes through a filtering gateway in the cabinet before it reaches the internet. It blocks adult, extremist, gambling and self-harm content to DfE filtering standards, and it enforces the Internet Watch Foundation's child abuse image list at the network. The policy is age tiered, so a Year 3 group and a sixth form see a different web on the same hardware. Monitoring runs alongside the filter. A library of safeguarding terms, covering self-harm, child exploitation, bullying and radicalisation, is matched against what pupils type and search. A match does more than block a page. It raises an alert to your Designated Safeguarding Lead with the pupil, the machine, the time and a screen capture, so a concern reaches a person and not just a log. Everything is recorded per pupil, so when a question is asked, the school has an answer it can stand behind.