I have been impressed by the Public access channels here in Hawaii
Right now one of the channels is going over substitution of variables in integration- other times I have seen them going over fairly advanced statistical mathematics, teaching the Japanese language, and doing lessons on genetics and marine biology. All at a fairly advanced level...
Of course the public access has its share of loons as well- UFO nuts talking about their abductions and an absolute loon talking about astrology to name just a few...