"Although teachers must plan classes diligently--indeed genius may be diligence--the teaching life is messy. You don't sit in a study surrounded by leather-bound books, titles stamped on their spine in gilt. You sit in a classroom, students and their lives chaotic about you, emotions slipping loose like pages from paperbacks...Beware of neatening vitality out of life and students. In fact, studied or planned clutter should fill the schoolroom: posters, mobiles, pictures, plants, knickknacks, and memorabilia of all sorts."
--Sam Pickering, Letters to a Teacher