Outside of the relationship of a knowledgeable, caring adult with kids - none of it actually matters.

1. The Game
2. Tommy's Tongue
3. WW1 Encyclopedia
4. Great War Curriculum
5. Great War Resources

I - Ink

Iddy Umpty:

Signaller. Iddy and umpty were verbal ways of expressing the dashes and dots of Morse code.

Iggry:

Hurry up. From Arabic. One particular crossing in Bullecourt was named Iggry Corner by the Australians.

Imshi:

Go, be gone, shoo. From Arabic.

Interior Economy:

Quiet periods when men would turn their attention to personal admin - sewing on buttons, darning socks, etc.

Iron Ration:

Emergency ration of corned beef, tea, sugar and biscuit. Carried by all soldiers in case cut off from normal food supplies.