With an excellent teacher versus an average teacher, students make about an extra half-year of progress every year—closing achievement gaps fast, leaping ahead to become honors students, and surging forward like top international peers. But existing strategies alone will never fill our 3 million classrooms with teachers as good as today’s top 25 percent. Schools can fix this by extending the reach of excellent teachers using job redesign and technology. New school models also offer all teachers career opportunities. Advancement allows greater impact on students and more pay—within budget. We call this an Opportunity Culture.