It’s been said that practice makes perfect, but only if you make the most of that practice. That’s the theme of the new book Practice Perfect. For many people, practice means hours at the piano when we were kids, or long and boring sessions that we would rather avoid. Practice Perfect co-author Katie Yezzi, the principal at the Troy Prep Charter School in Troy NY, says the book can improve anyone’s performance, but it came out of efforts to produce better teachers.