I played a really cool game of Squad Leader yesterday with my housemates two teenage sons. We played the Guards Counter Attack scenario. The guys didn't know the rules - but that didn't matter. I acted like a kind of 'game master' and led them through the game as they played against each other - leting them know what phase they were in, .what the different units could do, and let them know about different rules as the situations arose. Pretty soon they were starting to get the hang of some of the basics.
The game took about 2 hours. Half way through the TV was turned on because X-Men was on! This was mildly distracting, we'd be half way through a phase and then Wolverine would be fighting some special forces dudes with knives. Then I'd be like, whose turn is it again??? That's right, it's your turn, and the game would continue. I would have preferred no distraction from TV, but these guys are teenagers and like to have 3 things going at the same time.
The result of the game: A decisive victory for the Soviet Union's forces, with only one unit KIA, an infantry squad that went beserk and ran accross an open street to engage their opponents. They were massacred as they ran! While the Soviets casualties were light, the German forces were almost completely wiped out by the end of the game.
I found that playing the game as a 'game master' was a good way to play. I made rulings based first on what the rules said, and then secondly on what I thought would happen logically if the battle was really happening (a couple of times a situation happened that I wasn't sure exactly how the rules applied, if at all. If I couldn't find the rule after a quick flick through the appropriate section I would make my own logical ruling.)
We played the rule that if you moved the units to a hex, then they really moved there and you couldn't move them back - this made the guys think before moving, and also led to soldiers going to the wrong places - ie "what the hell are we doing here! We should have gone over there!" We also played the rule that you announced intention to fire before checking Line of Sight.
I let the guys know when enemy soldiers were moving across their Line of Sight and put the little cross hair counters on the units - but in future games I'll make the players pay attention to this instead.