But not positive. I vaguely remember it was a Python product. Not sure I can recommend it. I remember it not being nearly as polished as SO and not sure it's being actively maintained.
It's a shame that you can't use Stack Overflow itself constructively for this. I think Stack Overflow usage would be a great lesson for any introductory class. Just teaching new devs how to write a good Stack Overflow question is an invaluable step in problem-solving, even if they never post it.
Unfortunately, at the moment, I fear a good part of that lesson would be "the talk" about navigating the tricky culture of Stack Overflow.
