As you may know for some reason some magic is more potent when you are "ahem" naked, and therefore it is important to be able to disrobe quickly to cast these spells and then be able to dress quickly. That is why our standard Academy uniform is a robe open at the front which has been liked to a simple somatic gesture with your hand, like thus. (She twirls her left hand in a gesture and the robe loosens and falls to the floor, leaving her completely nude.) "I now can cast my spell... AURA LUX! (a golden light aura surrounds her) and now I reverse the gesture.. (she twirls her left hand in the other direction, and her robe rises back over her and secures itself with the sash in a fluid motion.

Now each of you practice this gesture.. (it takes you a few attempts but you get the first gesture correct and your uniform (a glorified blue bathrobe with the school logo) falls to the floor, leaving you completely exposed. Looking about the room you see several others in a similar state.