Why, then, if there are so many challenges to the teacher-coach model, do so many schools work so hard to try to preserve it? Because, when it's done right, I believe there is no more powerful or mutually beneficial relationship between a student and teacher. Bonds of trust and respect built on the playing field are brought into the classroom. Students learn that homework, like athletic drills, is intended to help them gain mastery of a new skill. Teachers are reminded that just as students' bodies lend them particular advantages or challenges, so do their brains.