I find that often times therapists, teachers, my principal, etc. will come to look for me or my class and we are not there.
Whether my class is out on the playground or we are all out on a nature walk, it is important to let everyone in the building know where we are!
I made this wheel door sign quickly to hang up on our door, so when we leave I can move the arrow (or assign that job to a student!) and others will know where to find Miss Melissa's Class!