Corrected entry: Throughout the show, the character's lockers continually change position. For example, Rachel's locker is at first near the end of a row, a few down from Quinn's, yet later it's in the middle of the row, nowhere near any of the other Glee kid's lockers, and even later it's the second one down in a completely different row.
Corrected entry: At the end of "A Very Glee Christmas", 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.