Decorative Wooden Rulers - "Teacher's Rule" and "It's Okay to Not Know" Wall Signs - Set of Two Tell your favorite teacher "thank you" with this set of signs. Both signs have a classroom theme with ruler and chalkboard design Signs read "It's okay to not know but it's not okay TO NOT TRY" and "Teacher's Rule *Sit down, *Please be quiet, *Please pay attention." Signs are shabby chic in appearance and have brown ribbons tied in bows attached to make them easy to hang on the wall Signs measure 6" x 10.5 " and are made of sturdy particle board