The paper investigates the subject of schools with a high concentration of immigrant children in the City of Milan. It looks at the factors which have contributed to the creation of a heavily polarised situation. This thinking forms the background for the description of a multi-cultural integration project organised by a broad network of participants including the Department of Architecture and Planning. The keys to interpretation connected with the idea of spatial justice help to make it possible to place the spaces of social and urban inequality back at the centre of urban planning. The focus here is on the limitations and possibilities of a policy approach based on the issues of personal and collective capacities, the relationship between endogenous and exogenous factors and the tension between the design of spaces, practices and uses.
Keywords: Urban inequalities, integration and participation; spatial justice