They don't have any.
Miller has ditched chairs for exercise balls.
And the kids at Bauder Elementary School in Fort Collins, Colo., love it.
Ten-year-old James Howell says they're "awesome."
The fourth-graders have to pay attention to sitting, which means they're paying attention.
Miller says "when your body's engaged, your brain's engaged."
Of course, there's some wiggling and bouncing.
But Miller says on balance, the balance balls help the children be more productive in class.
CLICK HERE to follow Action News on Twitter
CLICK HERE to get Action News on your website
CLICK HERE to find Action News on Facebook
