When students at the McLean, Va., school show up for P.E., they’re handed iPads and iPod Touches. The devices let them scan Quick Response (QR) codes — black-and-white boxes — on signs scattered along a quarter-mile path that loops around the playground. The codes trigger videos showing them how to perform exercises.

Check out the Cool Schools: Using QR Codes For Learning and Fitness At Chesterbrook Elementary article  from wusa9.com, Washington, D.C., which features a great video!

Source: www.expressnightout.com & WUSA9.COM