 Seating arrangements and class activities may be planned taking into account the temperaments of the students but this is often not readily apparent to observers.Steiner also believed that teachers must consider their own temperament and be prepared to work with it positively in the classroom, that temperament is emergent in children, and that most people express a combination of temperaments rather than a pure single type.In most Waldorf schools, pupils enter secondary education when they are about fourteen years old.