Reformers suggest that parental choice will improve equity by making it possible for parents to select better schools for their children. A key assumption behind this claim is that parents choose from a set of schools that range in quality. Data from this longitudinal interview study suggest this assumption may be false. In one Midwestern city, parents of different social class backgrounds did not consider schools of similar quality. The set of schools considered by parents, called the choice set, differed; though parents' choice processes and reasoning were remarkably similar. These data suggest that in addition to the well-documented constraints of income, information, and transportation, the resources used to construct choice sets may further constrain the schools parents consider. These findings raise questions about the ability of current choice policies to deliver the equity outcomes reformers suggest. (Contains 3 tables and 13 footnotes.)