place-based learning.2 One such example, Dow Day, is a mobile documentary that relives the student protests of 1967 in Madison, Wisconsin, against the Dow Chemical Company. In this activity, location-aware handheld devices add an augmented layer of history to a walk through the campus, placing the student in the role of a news reporter. By monitoring the device's GPS, Dow Day creates the illusion of additional characters standing in physical space and facilitates simulated conversations with these historical entities. In addition, when players walk to predefined media locations, they trigger video footage showing the physical scene from 40 years ago, effectively superimposing the marchers and police onto the current landscape (see Figure 2).