Hi Sher
I have done one beginner class in lampwork and it was a full day course. I don't really have any complaints about the class that I did but there were some things I thought that were good and other things that I thought could have been better.
The good things were the reinforcement of safety - how to turn bottles on and off properly, and torches on and off properly, storage of bottles, pitfalls for the inexperienced etc. Dealing with molten glass, flames, and explosive gas is dangerous, and I think my teacher did a fantastic job of scaring us just enough so we were cautious.
Another good thing was the teacher would come around and sit at your torch and let you and other students watch while he made a more complex bead, so you could see how he did things and held things etc. This gave me and other students a good view of how he handled the glass.
Probably the only disappointing thing was he didn't teach us much about decoration, I kind of fiddled and made it up as I went along, and therefore I was a bit disappointed with my beads because they didn't come out like I had envisioned. Molten glass just doesn't behave like you think it would!
One other recommendation - as a beginner it is easy to become disheartened with your abilities, so if you can keep your students happy with their progress, they will be happy with you as a teacher.
Hope I helped some!
Beccie