Earlier quoted context omitted.
It's hard to believe that a suitably motivated college student couldn't figure out a way of getting around that kind of scanning - what about papers in books, info on phone screen, even someone holding up posters at the window.
First thing I thought of was taping the "cheats" the the back of laptop screen ;P
'I spy with my little eye and it is 'white'' -> the white of your eyeballs.