The little ditty about how we remember things-
10% of what they read, 20% of what they see, 30% of what they hear, etc.
is a fraud! AND yet, I betcha that I’ve heard it in educational settings (grad school, meetings and in workshops galore).
This article discusses these erroneous statistics with some history of how they might have come about.
Thanks to Bill Heroman for the HT. He also has some commentary on learning.