When I took a class to become licensed in scuba diving, we spent the first half of every session in a classroom taking notes on some skill we would have to practice in the pool. I typically jumped in the pool for the second half of class thinking I had that skill mastered; within a few minutes my fluency illusions were dispelled, and I floundered around for a while, doing it completely wrong until the instructor swam over and gave me some (immediate) feedback, at which point the real learning began.
