As cities across the country and globe continue to generate new solutions to a wide variety of vexing problems, sharing information about what works and what doesn't has become more important than ever. Yet, outside of a few prominent policies, the vast majority of successful municipal experiments never reach a national audience or, for that…

A daily war is waged in schools all over the United States over wall space. Adolescents are using school walls to convey messages, create name recognition, slander each other, or for claiming territorial space. On the other side is the school administration, which paints over and erases these unsanctioned claims to space, power and identity, as it…