[Cory]

Originally Posted by Tristan Lall

Only with probable cause, or in an area where it is clearly indicated that acceptance of search is a condition of entry. (They do this at international borders where you can simply turn around and not cross the border if you do not consent to a search, but can't do it for an entire school, because you can't be compelled to enter such an area.)

It doesn't take much for a teacher/adminstrator to claim probable cause.