The Open Doors Organization offers free training sessions to ground crew in how to load powered mobility devices onto airplanes. They also have cards depicting loading techniques – where to lift, where not to lift, how to pack safely, how to detach pieces – that allow for non-verbal communication in noisy areas (like the tarmac).
These are re-posted with the ODO’s permission.
They also have a series of mobility-device specific tags to use, rather than the standard gate-check tags, that list specific information.