Write your name on top, print on card stock, and laminate. Place on front door and use a clothes pin to move to show others where your class is when not in the classroom. A great way to let others know where you are at all times. Locations include:
Lunch, Art, Recess, P.E., Computer Lab, Field Trip, Cafeteria, Media Center/Library, Another Class, Music.
The teachers in my school all have them on their doors and administrators love them. Easy and fun way to communicate with everyone.