Urban politics in the early 21st century is structured by conflicts over social cohesion and economic competitiveness. Education policy takes center stage in this struggle as schools are institutions of both social and economic reproduction. I draw on arguments of urban regime and policy frame analysis to examine the politics of urban school reform in two Swiss cities. Empirically, I analyze neighborhood-embedded bottom-up school reforms committed to social cohesion. The paths these reforms eventually take were shaped by different coalitions geared around specific school policy frames. Frames indeed play a crucial role in building a coalition toward progressive school reforms. In addition, their sustainability in a political environment, increasingly shifting toward development policies, hinges on the dominant frame underlying the reforms as well as the properties of the network advancing them.