Leave a Note
Leave a note on one of the whiteboards in the classroom, or post a small note on the door asking for the item to be returned to you.
Central Services Office
For items overlooked for a longer period of time, contact the Central Services Office (located on 19th and Wheeling) at 303/724-1777 and ask if your belongings were turned in there by janitorial or other staff.
If your item is of greater value (including your Campus ID), you may contact University Police at 303/724-4444 and inquire there.
If you lose your ID, contact ID Badging immediately so your ID can be 'turned off' and you will be re-issued a new ID with all your old permissions/setting intact.