Armageddon, no? Then Legageddon!

WHO are you designing your game for? (Include the player's age, abilities, and prior knowledge of your topic.)
WHAT will your game teach the player about your topic? (Be specific!)
WHERE does your game happen?
Describe the world you will design for your game.
How will this setting add to the learning experience?
HOW does your game world teach the player about your topic?
What happens in the world that helps the player learn?
How does the player use what they learned to make something happen in the game?
WHY is a game a better way of understanding your topic than a quiz?

Who? I imagine that 10-15 years of age and any amount of prior knowledge of the subject.
What? I believe that our game will revolve around three points in history, Caesar's rule of Rome, \WWI and the Titanic.
Where? The actual 'story' of our gametakes place in A library based around 3 books.
How? People will in game talk about whats happening.
Why?  Probably the interaction you can get with a game.

References:

http://myglife.org/usa/srms/index.php/Mrs._Garrett%27s_Course_Schedule