I definitely see how you need to protect your supplies, but please, as an art
certified teacher currently subbing, at least leave out a pen/pencil and a
piece of paper - I was recently subbing in a classroom in which everything was
locked up. I had to borrow a pencil from a teacher in another room just to
write the room teacher a note on how the day went and take attendence! And
there was nowhere I could stash my purse.