This document discusses the need to move away from the traditional "unified" school district model and toward a 21st century school system model. It outlines some key features of the traditional model like centralized decision making and lack of school choice or performance accountability. It then discusses features of the 21st century model like school autonomy, accountability for performance, family choice between school models, and competition between schools. The document cites research showing improved student outcomes in districts that have implemented aspects of the 21st century model, like New Orleans, DC, Denver, and Memphis.