For many years it was normal & accepted practice for humans at school and for dogs in a training class to be taught in a classroom/hall environment where a "teacher" instructed & sometimes demonstrated to the class what they were learning that day and pupil/dog owner were supposed listen, maybe have ago and to go away with some "homework" and remember it before the next class. While I have been learning to become a better trainer I have found there are different and new ways to do many things that my client and their dogs expect from a dog trainer. One of the most enlightening to me was that over the last few decades the way people learn has been researched. It has now been accepted that one method does not fit all, as humans learn and retain information in different ways due to their physical limitations, genetics, upbringing, emotions, personalities & many other factors.