Overlap Maps

Mr. Byrne at Free Technology for Teacher highlighted a website that could be great for social studies/geography lessons.  His post discusses some of the features of OverlapMaps.com.  The site lets you compare the size of two places (countries, states, bodies of water) by having one overlap the other.  A lot of times, my students have trouble visualizing differences in size and viewing it on an ordinary wall map or globe doesn't always help much.  This site lets them easily compare the size of places and could be a nice addition to any study of places.  It could even work for comparing settings in stories or birthplaces of famous Americans.  You might as well use it in math too when discussing measurement topics like size and distance.  It is a relatively simple tool, but I think kids would enjoy it and benefit from what it shows them.  Plus, it is easy enough to do whole group or for the kids to do on their own.