I don’t know too much about distros, but you want something quite light. Let’s be real, enterprise like schools won’t pony up everything for Debian, especially when they just use Chromium and maybe Libreoffice. Schools are cheap, and if you can hacksaw together an Arch-based thing, they WILL buy miserable hardware, that can just barely run it, and an 8 gig SSD is much more stomachable for them than a 32-gig for Debian. SteamOS doesn’t completely crash, and that’s infinitely more complicated. This is basic Arch, plus a WM, plus Firefox/Chromium/Whatever.