I also want my classmates to have the skill level needed for the class being taught. I am all for stretching one's skills - but I don't think it's fair to the rest of the group if the class would be something like advanced baltimore beauty applique and the person doesn't know how to thread a needle yet.
On the other hand, if the class is below your skill level - just enjoy it and let the instructor do his/her thing. If you want to be helpful to your classmates, do whatever the same way the instructor is doing it.
Something to add to the tool kit. Nail clipper and nail file.