"Sound it out." Or so her mother said; by the time Korva started school, she knew the letters, and only had to learn more words. "Learn the sounds the letters make, and figure out what words they're spelling. The basics are simple. It's fluency and - vocabulary, I think, that take the bulk of the time. But most of that isn't taught at all, it's just practice."
... anyone can do it, really. Scale your expectations down to just literacy, and expect that anything else can be taught by the books, and doesn't take a wizard, it just takes -
"Maybe we're thinking of this wrong. My mother taught me half of how to read before I even started school, and she wasn't a teacher or anything, she was just a clerk somewhere. If there's useful material to be read, you don't need make people learn. And if you're just doing reading, you don't need specialists, you just need someone literate, and - books. Maybe a book to explain teaching, for anyone who isn't confident in it. But -
"How much would it cost to give every village access to a library, instead of a school? Not a big one, just - reading primers, textbooks that cover everything else, histories, holy texts, the legal code - maybe some fiction curated to play to people's actual interests - if they're sharing you don't need one for every child, right -"