University academic staff, even when teaching students under 18 do NOT require a "Working with children" clearance or "Blue card!"
Some of them probably should be checked. There were some total deviant creeps working at the Uni I went to at 17
You are right of course, in this state they are exempted as shown at the link below, no idea why. Maybe its because uni classes are generally undertaken in a group and underagers are in the minority.
As the link below goes on to say that 'Police Officers who work with children no longer have to apply for blue cards' you can guess how well thought out and practical the whole scheme is. They also gloss over the fact that this sort of screening (similar to ASIC screening) only filters out people who got caught.
Employment Screening
Out of interest, is this a standard requirement for instructors or is it only this school that's advertising it?