Ironsides is a set of free wargames rules for the English Civil War by Howard Whitehouse.
One Page Battle of Hastings Rules
Battle of Hastings is a simple, one page set of free wargames rules for refighting the classic 1066 confrontation between the Normans and Saxons. Reading the rules makes me think that it is designed for use in a classroom setting.
Making Textured Paint For Foamcore Buildings and Ruins
This video tutorial covers making textured paint for foamcore buildings and ruins.