On Friday nights across America, teams of football coaches lead their athletes onto the playing field for a performance that will be viewed and judged by their communities. The coaches feel intense accountability. They know their communities want them to win the game, and the coaches feel they must show players’ weekly improvement. As the games end and the lights go out, the coaching teams huddle to continue their work. They pore over the statistics, review their game plan, and tend to injured players. On Saturday morning, their work continues. They review the game on tape, evaluate every play’s success and every player’s performance. Then they turn their attention to the next week. They still have to draw up game plans for next Friday, develop