A weekly problem I submitted has not been returned to the 'marked' tray. What should I do?
Did you submit your work on time, and in the right slot? If not, it should turn up next week. If so, check the "no name" tray for your Level and the other Levels; check the trays alphabetically above and below your own; check your "own" tray for the other Levels; check the tray corresponding to your first name; check the surfaces around and about the postboxes in case another student has left some of the scripts lying around. It may be that another student has accidentally taken your script away with his/her own, in which case yours may reappear in a day or two, when the other student discovers this.