Do you need maps for your teaching? EurAtlas has beautiful maps from a range of time periods available for personal or educational use.
Maps that are particularly useful to teachers of Latin and Classics:
Antique maps, including the Peutinger Tablet:
http://www.euratlas.net/antique/index.html
Maps of Europe from the year 1 CE to the year 2000 CE:
http://www.euratlas.net/history/europe/index.html
Maps of Greece from 200 CE to 1900 CE:
http://www.euratlas.net/history/europe/aegean/index.html
Maps of the Pyrenees/Rhine from 1 CE to 1600 CE:
http://www.euratlas.net/history/europe/pyrenees_rhin/index.html
The Seven Hills of Rome:
http://www.euratlas.net/Roma/7colli.htm
Regions of Rome:
http://www.euratlas.net/Roma/regiones.htm
Rome in the year 100 CE:
http://www.euratlas.net/Roma/rome100.htm
Pictures of famous Roman sites:
http://www.euratlas.com/Atlas/rome/index.html