You have probably heard this one:

"We learn
10% of what we read
20% of what we hear
30% of what we see
50% of what we see and hear
70% of what we discuss
80% of what we experience
95% of what we teach others.”


(William Glasser's interpretation of Edgar Dale's "Cone of Experience")


(see also http://www.willatworklearning.com/2006/05/people_remember.html)