Late, but for what it's worth I've been around maintenance most of my life and here's my $.02 Take a look at the bike wiki where I've posted the basic maintenance class I use. IMHO it is a real disservice to not start with the basics and then move to overhaul. So the order is important start with stuff the students can use right away. My class is also based on classes I've taken including from independent instructors.
Can't ride if the tires are flat. "A" Air
Now it had better stop. "B" Brakes
Pedals/crankarms and chain so it;s not a push bike "C"
And a derailleur so it's not a single speed. "D"
Then teach hub overhaul, headset and bottom bracket.
Last is frame inspection and repairs if you have the tools.
So you can use the Park Manual for all of this, plus their videos and others on YouTube you find helpful.
I can teach flat repair hands on and the rest as "Show and tell" in 3 hours, two, a max of 3 students per instructor/assistant.
The ABCD can be taught in sessions, and out of order, but do your students a favor and start with stuff they can use with basic tools.
We have what's become two fractions at our coop and the people who work with new volunteers refuse to consider requiring a class, or that the volunteers must put in a commitment. Every volunteer I've ever had take my class has said "Gee, I wish I'd had this first." rather than just stripping bikes for a few weeks,boredom sets in, and they leave. I tell potential volunteers I will give the 3 hr. class for free, if they give back 9 ours. That's 3 sessions of open shop helping patrons or refurbishing bikes. If we never see them again, they got a good basic education and we got some help. IMHO if they can't commit to that, then sorry but we have others to help. So far I see a good 80% turn over in volunteers, in part I believe because we don't set them up to succeed.
Like I said, my $.02
Ron