Late but . . . http://www.bikecollectives.org/wiki/index.php?title=Maintenance_Classes
I suggest you start with the end in mind. What do you think it's important for your students to learn. Can it fit in the time available?
I'm probably a loaner in this, but I prefer to give them an overall basic understanding and then go back and teach the details of the sub-systems. If you have time, overhaul is great. But I can't see learning how to overhaul a hub if you can't fix a flat or make sure the bike will stop.
I too use a modification of the American League of Bicyclist list (
http://www.bikeleague.org/content/smart-cycling-tips-0) to teach a basic tune-up/ minor troubleshooting class in 3 hours. We dismount both wheel assemblies, remount them, and break down the front wheel. I puncture and old tube and they patch it the old fashioned way. LOL, I have a vintage Camel path kit to quickly talk about why you don't want to light up the vulcanizing fluid.
I'm going to start using the hand drawn open source component break-downs at the beginning as reference sheets for vocabulary.
I can tell with in :30 minutes as we do the wheels if I will be able to do the brakes as hands on or if it will be show and tell due to time constraints. But at least they learned how to fix a flat. If anyone has Vee brakes, I go in depth into how to adjust them and why the rim has to be straight and how to do a quick on bike wheel tune. After that the other types are easier to cover and explain the different safety margin. C & D are pretty straight forward, we did some of "C" in brakes. I show how on "most" bikes you can loosen the rear derailleur cable and use that to demonstrate cable maintenance. let everyone feel the before and after drag. Later that makes a good reference for an explanation of the index shifter and why drag is bad.
For a longer multi session class, I suggest you do wheels first as a quick assessment of skill level. For some people "righty-tighty" is outside their skill level and they will require a bit more attention. Few are stupid, that's not the point. It's just mechanical things are foreign. I give them credit for trying something new.
A is for Air
B is for Brakes
C is for cranks (pedal attachment check) and chain, cables
D is for Derailleur (how it works, what the limiting screws do and don't do, basic troubleshooting and how to check alignment)
If it can't roll, it's an art piece.
If it can't stop, you're dead.
If any of these things fail, it probably won't be good.
If this is working properly, you will enjoy ridding more.
Plus A,B,C,D is easy to remember.
I've picked up several tune-up sheets from the web, drop me a note and I'll send you a link to my documents, they include the hand drawn open source component break-downs.