Winter is the perfect time to practice meditation. Open with this quote:
Do not dwell on the past, do not dream of the future, concentrate the mind on the present moment.
Then teach a whole class where you keep your student’s mind focused on a single point, in the present moment. Narrow the minds’ of your students through the whole class and remind them to return their mind back to the point of focus if their mind wanders. Be clear about what the point of focus is by stating it, use one alignment cue, re-phrase what you are saying or repeat it in the same way over and over again so you stick to that one point of focus for at least a minute, then go to the next one and do the same throughout the whole class. Once you get to the meditation the mind will be still. Close with this quote during meditation:
To the mind that is still, the whole universe surrenders.
– LAO TZU
Then in savasana emphasize the expansion that occurs in the mind after narrowing the focus for a long time and this mind expansion is samadhi, expanded consciousness. Let them rest in samadhi in silence.