Make and put on the door - Teach-A-Roo: Ticket Out the Door! This can be used as an exit ticket. You could put critical thinking or math on the door. This gives the students something to do when waiting at the door.
ROOT CHAKRA MUDRA - Let the tips of your thumb and index finger touch. Concentrate on the Root chakra at the spot in between the genitals and the anus. Chant the sound LAM and get a nice connection to the Root chakra.