The teacher can wear it concealed or openly. It could be in a lock box in their desk. It could be in a lock box mounted on a wall. WHERE to keep it isn't much of a problem.
good next time you can consider visit China lol Merry Christmas to you and your family ! here's a Chinese Butterfly Lovers ... hope you like it http://youtu.be/h1DqfJtd3sU via @youtube
Dear 377OHMS Merry Christmas to you and all your loved ones ! Happy Holidays! http://youtu.be/7UnSC4e_lsQ via @youtube