I love Google Maps and all other forms of online map tools, but sometimes a Geography teacher just might need a good old-fashioned paper outline map. Houghton Mifflin Harcourt offers these for free on their Education Place website. At the Education Place teachers can find labeled and unlabeled physical and political maps. All of the maps open as PDF files for convenient printing and photocopying.
Here are some related resources that may be of interest to you:
National Atlas Map Maker
The History Channel's Guide to the US States
Slide Map - Photos of the World on a Map of the World
FREE National Geographic map with purchases $65+!