Great question, Kathleen. I would love to see others respond with ideas and suggestions. While I prefer to manage by rewarding good behavior, I think that violations like this need to be treated with appropriate consequences. Such breaches should be disciplined accordingly. On the "encouraging good behavior" side, I would suggest making compliance as easy as possible. For example, if there is a common shredder that is not convenient, you may consider small, individual shredders that can be at every desk beside a trash can. They are relatively inexpensive and far better than the consequences. For cabinet keys, keeping the key on a wrist band or lanyard may be a helpful way to encourage locking at all times. For the phone, providing a script on a polite way (scripted) to tell parents and others that for the privacy of the student, you cannot share the information. Those are a few thoughts - I encourage others to chime in.