World History Tabletop Sims
Commercial Games
Geography (natural resources)
- Settlers of Catan (Mayfair Games)
Ancient World
- Agricola ( Z-Man Games) – Turn-based peasant agriculture in the Roman world
Roman Empire
- Catan Histories: Struggle for Rome – Mayfair Games
Medieval Europe
- Domaine – Mayfair Games
Colonization
- Settlers of Catan – Mayfair Games
Cold War
- Twilight Struggle: The Cold War, 1945-1989 (info)


Aloha Dr. McCall,
Have you looked at the board game offerings from GMT Games of California?
In particular the Commands & Colors Ancients, a series of games focused on the ancient Greeks and Romans. The game mechanics themselves are relatively simple, allowing one to both enjoy the games in and of themselves and to use them as a jumping off point forf more detailed study of the battles and personalities involved.
You might find these games useful in your classroom projects.
http://www.gmtgames.com/c-6-commands-colors-ancients.aspx
http://www.ccancients.net/
The games have certainly spurred my own research:
http://narukamisthunderbolts.blogspot.com/2010/08/playing-at-war.html