http://www.sciencedaily.com/releases/2007/07/070725105957.htm - Hand Gestures Dramatically Improve Learning
Kids asked to physically gesture at math problems are nearly three times more likely than non-gesturers to remember what they've learned. In today's issue of the journal Cognition, a University of Rochester scientist suggests it's possible to help children learn difficult concepts by providing gestures as an additional and potent avenue for taking in information.
"My intuition is that gestures enhance learning because they capitalize on our experience acting in the world," says Cook. "We have a lot of experience learning through interacting with our environment as we grow, and my guess is that gesturing taps into that need to experience."
I know PE, you didn't read it and you surveyed your scruffy old dog sitting at your feet who don't need to gesture to learn math, yet I still find it fascinating.