When coaching baseball, to keep players interested in practice, it is important that they be kept busy. Waiting around or standing in line is a killer. They are not only bored, but they aren’t learning anything. Practice needs to be fast moving and interesting. We’ve found that 10 minutes for any single fundamental drill is a long time for college players, so I think younger players need to change sooner. Here is an example from the iBook, Practice Baseball to Win.