A fourth grade teacher in Colorado has substituted her student's classroom chairs for large exercise balls.

Tiffany Miller made the change to minimize restlessness and increase concentration and she says that she is already seeing a difference.

Miller says the benefits are two fold.

"When you are actively sitting your brain is more engaged. The other reason is the posture is better which means that there is more bloodflow going to your brain," she said.

She admits that her technique may not work for everyone but it's perfect for her classroom.

The only problem? When a student leaves their seat they risk it rolling away.