Charter schools elevate choice and competition to foster educational innovations. indeed, these market-style mechanisms are intended to challenge standardized practices associated with district administration of schools. However, a comprehensive review of practices in charter schools indicates that, although some organizational innovations are evident, classroom strategies tend toward the familiar. Drawing on organizational and economic theory, this article considers the forces shaping educational innovation in market-oriented reforms. Although reformers assume that competition and choice necessary lead to innovations within schools, a more complex examination of competitive institutional environments suggests that mechanisms employed by reformers may actually undercut their intended purposes. The discussion highlights the potential for choice and competition to constrain opportunities for educational innovation and to impose pedagogical and curricular conformity.