We should teach abduction and Bayesian reasoning as part of a normal education. Epistemology overall is more of a collegiate/post-grad subject, but we have to provide some kind of foundation in epistemology. Otherwise we end up with a lot of kids who have tied their self-worth to knowing "science", but it's more of a slogan and catch-all phrase than something they can continue to build on. (Aside from the actual practice of whatever scientific field they end up in. Even then, we see in several fields epistemological problems rearing their heads -- and the leading practitioners clueless about what to do about it. Usually re-inventing the wheel in some ad-hoc fashion.)