Can literacy be taught? I don’t think so. You have to enjoy reading and writing and the thinking that goes into it before you can be taught anything, and even then you’ll probably end up being self-taught because you’re already interested. Being taught rules won’t help. Rules just take all the fun out of it.
I’m good at learning foreign languages but have no interest in rules of grammar. I think I’m good at it because I don’t care about the rules of grammar. Correct usage will come from practice, but the first steps are to have fun communicating in this new lingo.
School and schooling are a way of killing any natural interest and resultant delight that comes from interacting with the world. Standardized testing is the ultimate distillation of schooling and all that it entails. If you don’t get off on taking tests, then you’re probably not going to do well in school, anyway. Might as well start a garage band or learn to work on your own vehicles.
Certifications are false promises delivered by educators and enforced by those empowered to police the marketplace. The missing ingredient that cannot be taught is “get up and go.”
If I really want to learn something, I’ll find someone who’s good at it and ask him the explain it enough to get me started. Then I’ll go it alone.