I had this link saved for review and today I have taken a look.
It is a distribution that act like a server and show to the machines that connect to it from a we browser, various information sources such as Wikipedia or the Khan Academy courses. All offline and only need a SD card with 32 GB.
RACHEL (Remote Areas Community Hotspots for Education and Learning) gives more value to have a Raspberry Pi and have it as a server.
It's for schools with few resources where they can't get an internet connection or it's very slow.
If you want to try a demo, press here