Why and when courts will change policy has been the subject of significant scholarly attention, but there has been little effort to integrate this research within the existing research of determinants of state legislative policy change. In this article, the authors incorporate both of these research areas to answer the question of whether policy change will occur through the legislature or through the courts, examining the important issue of education finance reform. To understand and predict this change, the authors characterize the state policy environment as consisting of political, legal, and strategic factors. The authors find that a combination of political and strategic factors influences legislatures and the courts, but that law matters greatly to the courts, particularly state constitutional education clauses. The authors also find that institutional structure influences the degree to which politics matters to the courts.