I'm playing around with the idea using a wargame to illustrate the basics of small unit warfare as an ancillary element of a course next year. (This probably falls into the category of "ideas I'll be too busy to follow up on," but there it is.) I could go with a computer simulation... but there are certain challenges in teaching from that in a group. I could go with a boardgame, but they're rather dry, abstract, complicated, and non-visual for non-gamers. The third option (assuming it doesn't fall into the trap of "my prof plays with toy soldiers") is to use a miniatures-based wargame, which allows you to lecture as the game progresses (to a small group at least).
The question is, however, what scale?
Hobby wargamers largely game COIN/IW operations in 15mm, 20mm, or 25/28mm scales. Even though the ground scale of the rules need not equal the visual scale of the figures, for aesthetic reasons you are confined to 3-4 city blocks (or equivalent) at most, meaning that the tactical decisions involved are not much more than "do I go left through those building, or right around those?"
You can also wargame this is 1/285 or 1/300 microarmour scale. With the ground scales used in most rulesets, a 4x8" table will give you something like 2.5 x 5 km of simulated battlefield, which allows you to get much more in to approach routes, overwatch positions, ambushes, blocking forces, IED placement, etc. On the down side, infantry are so small as to almost be invisible (although depicted as fire teams with several figures to a "base", they're still very useable).
Of course, the fourth option is to do what I do now, and just lecture from powerpoint. That might actually be the most effective of all (although arguably considerably less fun for me or the students).