A Very Glee Christmas - S2-E10
Corrected entry: At the end Artie is given a ReWalk by Coach Beiste to help him walk again. However, at the time, the ReWalk was only available for use in rehabilitation centers, and not yet for personal use. In addition, it's highly unlikely that Coach Beiste would have the funds to buy a ReWalk.
Correction: The ReWalk became commercially available in January of 2010. Since it's entirely likely that a high school football coach might have contacts in the field of Sports Medicine, Coach Bieste probably just pulled a few strings and got one a few days early.
Captain Defenestrator