In many organizations, collaborating with peers, sharing resources, and codifying know-how are not typical facets of work activity. For such organizations, knowledge management support must help people identify and orient to opportunities for collaboration and sharing, articulate values and best practices, and assimilate sharing knowledge as an everyday experience. We discuss a participatory design project in which we are exploring these issues in the design of knowledge management support for public school teachers, leveraging a community networking infrastructure and everyday representational frameworks for knowledge. (Contains 1 table and 4 figures.)