Why is cellular signal required for lessons? Look at the photo (linked to elsewhere in this thread). If it's anything like some of the parts of the big rez I'

Why is cellular signal required for lessons? Look at the photo (linked to elsewhere in this thread). If it's anything like some of the parts of the big rez I've been to, the nearest school is probably three hours away over sand/dirt roads. The teacher teaches remotely to children spread over a thousand square miles.