This is a very unfortunate situation, but it doesn't have to be. You mentioned there being a grade for this class? So what is this teacher doing to make them earn it? Have you presented the idea to him of watching online tutorials in class, or out of class for homework? -How to use a drill(press), saws, mallets, etc. Pretty much if a team is going to use a shop, or any tools at all, that's where it needs to start.
If not, I highly recommend checking out this link of videos provided by MIT.
-I joined a Robotics lab this past semester at my University, and the first thing they said was to
"Watch these and understand them well."
1. They provide knowledge
2. More importantly, knowldge provides safety.
http://techtv.mit.edu/videos/142-machine-shop-1
As for the next thing: it being a class - Do you see an influx of the same students year after year, or is it a fresh start again and again. (Since you're new, you won't be able to answer that question, but keep it in mind as you head into the future.)
-The reason I ask this is because any class where recent members do not return will be more likely to be born onto weak legs, so to speak. If you do have students that return again and again, whether it be out of passion, or the search for an easy grade, make sure they can share any previously gained knowledge with the team. It's always better to reach a common ground with other students before you have mentors pushing knowledge towards you, which can be intimidating.
Essentially, you as a mentor should be making sure that no matter what these kids learn, they are proud of it. They should go around to their friends saying hey, did you know this worked this way, or look at this video, and such.
I know it's hard being the mentor in this situation not physically titled a teacher, but let me remind you, that's exactly what you are. So that's my two cents. Good luck changing the world.