Joe,
The text on the card isn't much to go on. A better translation might be simply "Before class." Were it a true "class photo" taken on the first day of training, for example, I would expect it to read "Vor der Einjährigenausbildung." This seems to me to be a snapshot taken one day before class.
The NCOs are themselves wearing candy-striped shoulder boards, so I don't think they are instructors. I may be wrong, of course. I seem to remember reading somewhere that one-year volunteers could enter the service at different ranks, .i.e, enlisted, Unteroffizier, or even Fähnrich. I'm working from memory, but I'll try to find the source on that.
As to the training they received, I can't imagine it was the same as the normal 2- or 3-year recruits had. First, their service was much shorter. Surely they received accelerated training? Secondly, their education level was much higher than the average recruit's. Not only did they come from middle-class (as opposed to working-class) families, they also had the Abitur and in some cases several years of university study.
To illustrate my point, take Friedrich Nietzsche: he began his university studies 1864, but didn't begin his one-year service until 1867. He served in a mounted field artillery unit in Naumburg (which meant he could live at home during his service!). In 1868 he was offered a chair at the University in Basel which he accepted in 1869. One must keep in mind that this is the calibre of people we are dealing with here.
Keep digging, Joe. You come up with the most fasciniting stuff!
Skøl!
K-B