I imagine the answer is the same: "get in the vortex first, then teach (or go into the classroom)". Do you know about resonant frequencies and sympathetic vibration? If you do, imagine that the more in alignment you are with something, the higher the volume you will project at that frequency and thus the more sympathetic vibration will occur in those around you with that same resonant frequency. If you sing loudly enough at the right frequency, you can shatter a wineglass using this principle. So if you get enthusiastic enough about teaching and learning a subject, those students that resonate near that frequency will begin to resonate sympathetically with you. And maybe just like with a group of metronomes that all start at different times eventually come into time with each other, perhaps all your students will eventually hum at that high frequency enthusiasm vibration. Just a thought.