Teachers ditch student desk chairs for yoga balls

 Robbi Giuliano teaches her fifth grade class as they sit on yoga balls at  Westtown-Thornbury Elementary School  Monday, Feb. 4, 2013, in West Chester, Pa.  Giuliano says "I'm able to get a lot done with them because they're sitting on yoga balls."   (AP Photo/Matt Rourke) Photo by
Robbi Giuliano teaches her fifth grade class as they sit on yoga balls at Westtown-Thornbury Elementary School Monday, Feb. 4, 2013, in West Chester, Pa. Giuliano says "I'm able to get a lot done with them because they're sitting on yoga balls." (AP Photo/Matt Rourke) Photo by
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