hand gestures and mathiness!
Hee! I came across this last night, and it's great!
Gestures Convey Message: Learning in Progress
Children who talk with their hands do better at math
[Washington Post article]
This explains a lot, and means there were probably a lot of little kids getting smacked in Rodney's first-grade class. And what a terribly cute mental picture that is, too.

May have to do a Hands of Enthusiastic Explanation picspam, because apparently research has also shown that teachers who incorporate gestures into lecture/explanation are more effective.
ETA: And, as
tx_tart points out, the potential to be really, really hot :>
Gestures Convey Message: Learning in Progress
Children who talk with their hands do better at math
Neuroscientists have found, for example, that the part of the brain that controls hand movements is often active when people are doing math problems. "As though you're counting fingers," Glenberg said.
[Washington Post article]
This explains a lot, and means there were probably a lot of little kids getting smacked in Rodney's first-grade class. And what a terribly cute mental picture that is, too.

May have to do a Hands of Enthusiastic Explanation picspam, because apparently research has also shown that teachers who incorporate gestures into lecture/explanation are more effective.
ETA: And, as

no subject
This, too, is very correct :> *edits for purposes of pointing this out*
Heh heh... am imagining Rodney hypnotizing a bunch of undergraduates.