Equally important is a related insight of the last few years: knowledge workers and service workers learn most when they teach. The best way to improve a star salesperson’s productivity is to ask her to present “the secret of my success” at the company sales convention. The best way for the surgeon to improve his performance is to give a talk about it at the county medical society. We often hear it said that in the information age, every enterprise has to become a learning institution. It must become a teaching institution as well.