BUILD A CITY! Box Town is an exciting Social Studies Urban Planning and Community Development PBL Unit that can be done as a collaborative activity with your Second, Third, or Fourth Graders. What better way to build ‘classroom community’ than by building a community in your very own classroom!WHY I CREATED THIS RESOURCE:Elementary students LOVE to explore and build. They are curious about cities, towns, maps, and geography. I have found that creating a 3D city is the perfect opportunity to nur