Presenting Material vs Learning the Material

I have known for a long time that retention varies with teaching method.  As a student, so much of my classroom experience revolved around the lecture format!  Although while suffering it I did not know the data, I now know that the average retention rate after 24 hours of content presented in lecture format is about 5%.
:(
My teachers were so very conscientious about presenting the material.  But the question is not what is presented.  The question is: 'What is learned?'

At the same time, this data does not mean that the lecture format should never be used.  It comes in handy sometimes.  Just as with food we need a balance diet, we also need a variety of approaches to teaching: lecture, reading, audiovisual, demonstration, discussion group, practice by doing, teaching, etc.  These are just a few, and we know that successful teachers use a variety of methods.