University of California
Us Geological Survey: Cartogram Central
The USGS offers detailed information on Types of Cartograms, Congressional Districts, Software for Cartograms, Publications, and a Carto-Gallery.
National Geographic
National Geographic: Population Density in the United States
Several factors contribute to the population trends across the United States. This lesson will explore maps to discover and understand these trends.
National Endowment for the Humanities
Neh: Edsit Ement: Mapping Our Worlds
In this activity, introduce your young scholars to the world of maps and discover a world of information online. Students learn how to identify different types of maps, comparing maps to the rooms of a house.