DALLAS — Peek inside Jennifer Cass’ second-grade classroom and you won’t see kids sitting on desk chairs in neat rows. Some gently bounce on stability balls. Others rock back and forth on plastic ...

Kimberlee Spaetig was the type of kid who just couldn't sit still. She'd always be jiggling a leg, tapping a foot. Now a self-confessed adult wiggler, Spaetig was in a staff meeting a few years ago ...

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Stability balls are more than just fun to sit and bounce on; they’re a great way to improve strength, cardio endurance, and balance. Using stability balls Stability balls, also called exercise balls, ...

Students sit on wobble stools donated through DonorsChoose.org during second-grade reading class at Hexter Elementary. (Ting Shen/Staff Photographer) Peek inside Jennifer Cass’ second-grade classroom ...