Adam, are you going to explain a system, or are you going to explain the mechanics of trading?
I only ask because if the former, you should probably start by going down that road first. If the latter then I would make it clear upfront that is what you intend to do.
Also I wouldn’t cover what the pipschool has covered unless you are going to expand upon it. In the interest of encouraging learning which is what you appear to want to do, I would also suggest you leave “homework” or “class debate” type questions open and after a set amount of time address them, and all concerns that were brought up during the discussion. This would allow for more people to learn, now and later, with a clear defined starting position.
Whichever direction, your off to a good start. Its clear your going to take your time and present good material, I just think a better idea of what material you plan to cover up front would be a good idea. Maybe even give an outline of some kind.