The fall is a time of letting go. As the trees let go of their leaves we are reminded to unburden ourselves of unnecessary tensions. In this class, you can focus the minds of your students on releasing tension.
This can be done by focusing on letting go of tension on the exhalation and cueing a long exhalation coming out of postures to release the tension of each pose and at the end of class by imaging the body expanding and the tensions dissolving in savasana.