How would I tell my students to "clear their desks"?
"Limpian sus pupitres" is the best I can come up with but it sounds odd. I just want them to clear all books/paper off their desks before a quiz/test. Thanks for your help.
Another teacher on board, good news
Quiten todo de sus mesas.
Fuera todo de sus mesas.
It's good to know that you are serious about regulations.
¡Vacíe sus escritorios, los niños!
If this vocab. has not been taught, Limpian sus pupitres! as you said
Ordenen sus escritorios
My old high school Spanish teacher used to tell us "¡Quiten los escritorios!" everytime we were about to take un examen o una prueba.