Q & A is a way to learn more about a topic from the expert.  Some people learn better with that kind of interaction.  I have been a lean through research kind of guy my whole life.  I just remember it better if I figure it out myself.  Some people learn best through visual medium.  I think that a visual aid is always helpful.  If you are having a problem picking up on how to do something, switch styles and see if it sinks in better.  Often a combination will make the task easier to understand.  Mo Howard West Virginia Football learn all three ways.