Several times over the past week or so, I've heard people here at work (a textbook publisher) refer to concrete and visual learning as more juvenile than abstract learning. Sure, we develop the ability to abstract as we grow older, but does that mean we should abandon other ways of learning? Don't some people learn better with concrete and visual cues? Some of this is vaguely familiar from some education classes I took a while back, but I don't remember enough of it to say anything intelligent to people who say stuff like that is juvenile. I need to look into the theory of learning styles.