And they all have Firefox and LibreOffice Calc installed, so you can teach them how to use a web browser and a spreadsheet in an OS-agnostic (and DE/distro/WM-agnostic) way.
Kids will learn how to use basically any software easily, they are sponges. The poor admin that has to deal with all the lost machine and device enrollment, and password resets and OS upgrades borking stuff, they are the ones who schools are optimizing for.