We have teachers who rely a great deal on observation and language. Teachers who rely a great deal on movement. Teachers who work with people mostly in stillness, for example when giving a table lesson. We have teachers who teach through classical procedures, and others who work through what I would call modern or post-modern procedures. We have teachers who teach through writing about the technique, through just sharing their ideas. We have teachers who incorporate technology into their teaching, videoing and online teaching, and we have teachers who don’t. We have teachers who use mirrors and teachers who never use them. I had a ballet teacher who, four days a week, drew the curtains over the long wall of mirrors, allowing us to use them only on Fridays. He said there were no mirrors on the stage.