2. Students could use their smart phones’ cameras to map their own neighborhoods, documenting (for example) the number of trash cans on street corners. That information could be plotted and shared city-wide, and the data could be examined for patterns and anomalies. Are there more trash cans in wealthy areas? If so, ask the mayor, the Department of Sanitation and the City Council for an explanation. Again, students will be turning information into knowledge. I wrote about this a while ago in more detail.