The prospects for a high-quality public education system for all students hinge on expanded roles for teachers. In particular, districts and states must create hybrid positions for teacherpreneurs: classroom experts who teach students regularly but also have time, space, and reward to spread their ideas and practices to colleagues as well as…

One of the most important aspects of NCLB is its demand that states ensure a "highly qualified" teacher for every student. This provision draws much-needed attention to the importance of ensuring equitable student access to high-quality teachers, write the authors. Some aspects of the provision have raised legitimate concerns--including…