Atlapedia Like an online almanac, with country info and stats, political and regional maps, and downloadable maps.
Google Maps Google's site for everything maps. Check out Google Earth too!
Latitude and Longitude Explains these terms and how they work.
Maps Home Page Helps kids learn about mapping.
Maps4Kids "Data is available on every State in the US, as well as for every Country in the world ! Maps4Kids.com is a great resource for fast facts about places in our world. The Top 10 page shows you the highest, longest, most populous."
What's my latitude and longitude? Go to this site and it will show you your latitude and longitude, based on your IP address. This could be useful as an introduction/attention step for a lesson on lat & long. Credit to David Stoline and reddit.